taxonID	type	description	language	source
D7768787FFBA0D351ADBFDDB1646FBE6.taxon	description	Habitat. Little information exists regarding the habitat associations of this species. Jaczewski (1928) reported the first collections of M. bila from a very shallow and small pool in a forest. Subsequent reports of collections were made from lentic habitats, on floating aquatic plants in small pools (Harris & Drake 1941) and at the margins of unshaded marshlands with dense vegetation (Torres et al. 2007). This species was also collected from lotic habitats, in standing or slow-moving water along the margins of streams and artificial channels with emergent and submerged vegetation (Fernández & López Ruf 2006) and in shaded streams without aquatic vegetation (Torres et al. 2007). In INR, specimens were collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFBA0D3A1ADBFBC41663FE84.taxon	materials_examined	Material examined. Galarza RS: 1 ♂, Yacaré Stream, 16. iv. 2013. Itatí RS: 2 ♂, Corriente River, 26. ix. 2003; 1 ♂, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 28. iii. 2014; 1 ♂, Itatí Lagoon, 28 ° 42.09 ’ S, 58 ° 6.92 ’ W, 28. iii. 2014. Laguna Iberá RS: 1 ♂, 2 ♀, Colonia Carlos Pellegrini, light trap, 2. xii. 2012; 2 ♂, 2 ♀, artificial channel, 16. ii. 2018. San Nicolás RS: 1 ♀, Carambola Stream, 28 ° 12.302 ’ S, 57 ° 26.300 ’ W, 13. xii. 2013; 1 ♂, 2 ♀, Carambola Stream, 28 ° 11.871 ’ S, 57 ° 26.292 ’ W, 13. xii. 2013; 1 ♀, Carambola Stream, 28 ° 11.523 ’ S, 57 ° 26.426 ’ W, 13. xii. 2013; 2 ♂, 2 ♀, Carambola Stream, 28 ° 10.866 ’ S, 57 ° 26.224 ’ W, 14. xii. 2013. Yahaveré RS: 6 ♂, 5 ♀, Medina Lagoon, 28 ° 33 ’ 52.6 ” S, 57 ° 45 ’ 28.7 ” W, 7. xi. 2015. On the road to Itatí RS: 1 ♀, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 28. iii. 2014. General distribution. Hawaiian Islands (introduced), Canada, USA, Mexico, Belize, Guatemala, Honduras, Nicaragua, Costa Rica, Panama, the Greater Antilles, the Lesser Antilles, Colombia, Venezuela, Guyana, French Guiana, Brazil, Peru, Bolivia, Paraguay, Argentina (Damgaard et al. 2012; Motta et al. 2018). Habitat. Mesovelia mulsanti is found in a wide range of aquatic habitats. It is usually associated with emergent or floating vegetation in standing water (ponds, lakes, lagoons, swamps, bogs, marshlands, puddles, ditches, artificial pools and dams) in unshaded areas (Herring 1950; Neering 1954; Cobben 1960; Polhemus & Chapman 1979; Rodrigues et al. 2021 a, b). It has also been recorded from lotic habitats (creeks, streams and rivers) in standing or slow-moving water, sometimes on top of hydrophytes (Usinger 1942; Cobben 1960; Polhemus & Chapman 1979; Souza et al. 2006; Torres et al. 2007), in a pond at a waterfall base (Franco et al. 2020), from brackish waters in the Lesser Antilles (Cobben 1960), and from saline waters around mangroves in Panama (Polhemus & Chapman 1979). At the INR, specimens were collected in association with Typha sp., Ludwigia peploides (Kunth) P. H. Raven, Salvinia biloba Raddi and Pontederia azurea Sw. (Poi de Neiff 2003) and from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, it was collected from margins with dense floating, emergent and submerged vegetation (mainly Cabomba caroliniana A. Gray, P. azurea, Myriophyllum aquaticum (Vell.) Verdc., Nymphoides indica (L.) Kuntze, and S. biloba) and organic debris in lentic habitats (Iberá Lagoon, Medina Lagoon, Itatí Lagoon and ponds) and lotic habitats (Corriente River, Yacaré Stream, Carambola Stream, Pay Ubre Chico Stream and artificial channels), mostly in open, unshaded areas. In particular, some specimens were found on floating leaves of N. indica in Itatí Lagoon. Three specimens were also taken at lights in Colonia Carlos Pellegrini.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB50D3A1ADBFD3E10CCFAD4.taxon	materials_examined	Material examined. Laguna Iberá RS: 2 ♀, Colonia Carlos Pellegrini, light trap, 1. xii. 2012. Yahaveré RS: 1 ♀, Medina Lagoon, 11 – 13. xii. 2014. On the road to Itatí RS: 1 ♂, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 25 km NW Mercedes, 27. ix. 2003. General distribution. Brazil, Bolivia, Paraguay, Argentina, Uruguay (Moreira et al. 2011 b). Habitat. This species is usually associated with floating, emergent or submerged vegetation in the margins of ponds, lakes, lagoons and marshlands, in unshaded areas (Drake & Chapman 1958; Poi de Neiff & Carignan 1997; Fontanarrosa et al. 2004; Fernández & López Ruf 2006; Torres et al. 2007). It has also been found in rivers (Rodrigues et al. 2021 b), along the vegetated margins of streams in standing or slow-moving water (Drake & Harris 1943; Torres et al. 2007), and on urban rain pools without aquatic vegetation (Fontanarrosa et al. 2004). This species was collected in a pond with Salvinia minima Baker and in streams with Azolla filiculoides Lam. and the bryophyte Ricciocarpus natans L. (Corda) (Ronderos et al. 1969). Poi de Neiff (2003) reported the first collections of L. lacuniferus from Iberá in association with Salvinia biloba and Pontederia azurea. At the INR, specimens were collected from the vegetated margins of Medina Lagoon, in unshaded places, and in standing or slow-moving water along the margins without aquatic vegetation of Pay Ubre Chico Stream, in shaded places. Two specimens were taken at lights in Colonia Carlos Pellegrini.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB50D3A1ADBFA1B169EF815.taxon	materials_examined	Material examined. Yahaveré RS: 1 ♀, Concepción de Yaguareté Corá, house for researchers, swimming pool, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 8. xi. 2015. General distribution. Hawaiian and Canary Islands (introduced), Canada, the USA, Mexico, Costa Rica, Panama, the Greater Antilles, the Lesser Antilles, Colombia, Venezuela, Guyanas, Brazil, Ecuador, Peru, Bolivia, Paraguay, Argentina, Uruguay (Moreira et al. 2011 b). Habitat. This species is found in shallow water mostly with dense vegetation, algal growths, logs and other floating debris in lentic habitats (ponds, lakes, swamps and dams) (Drake 1917; Drake & Cobben 1960; Bennett & Cook 1981; Torres et al. 2007; Muñoz Riviaux et al. 2010) and in lotic habitats (streams and rivers) in standing or slow-moving water (Drake & Cobben 1960; Bennett & Cook 1981; Torres et al. 2007; Franco et al. 2021; Rodrigues et al. 2021 b). It was also found on brackish water with algal growths in the Lesser Antilles (Drake & Cobben 1960). At the INR, only one specimen was collected in a swimming pool in Concepción de Yaguareté Corá.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB50D3A1ADBFA1B169EF815.taxon	discussion	Remarks. This is the first record of M. hebroides from INR. This species was previously recorded from Corrientes Province by López Ruf et al. (2003).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB40D3B1ADBFE0F15D4FACD.taxon	materials_examined	Material examined. Laguna Iberá RS: 1 ♀, Iberá Lagoon, sample 1, 2. xii. 2012; 1 ♀, Iberá Lagoon, sample 2, 2. xii. 2012. San Nicolás RS: 1 ♀, Carambola Stream, 28 ° 10.108 ’ S, 57 ° 25.787 ’ W, 14. xii. 2013. Yahaveré RS: 4 ♀, Concepción de Yaguareté Corá, house for researchers, swimming pool, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 8. xi. 2015. On the road to Itatí RS: 2 ♂, Mercedes Department, Pay Ubre Grande Stream, Provincial Route 29, 25 km NW Mercedes, 25. ix. 2003. General distribution. Panama, the Lesser Antilles, Colombia, Venezuela, Suriname, Brazil, Ecuador, Peru, Bolivia, Chile, Paraguay, Argentina, Uruguay (Moreira et al. 2011 b; Cianferoni & Buzzetti 2012). Habitat. Hydrometra argentina lives in a variety of aquatic habitats. This species is found on shallow waters among floating, emergent, or submerged vegetation in the margins of pools, ponds, lagoons, marshlands and swamps, in unshaded areas (Perez Goodwyn 2001; Melo & Nieser 2004; Fernández & López Ruf 2006; Torres et al. 2007; Peralta-Argomeda & Huamantinco-Araujo 2014). It is also found along the vegetated margins of artificial channels, streams and rivers, in standing or slow-moving water (Bachmann 1965; Fernández & López Ruf 2006; Pelli et al. 2006; Torres et al. 2007; Rodrigues et al. 2021 b), in ditches in rice fields (Hynes 1948; Nieser & Alkins-Koo 1991), in artificial reservoirs (Neri et al. 2005), and in urban temporary pools and lagoons without aquatic vegetation (Fontanarrosa et al. 2004). This species has also been taken at lights (White 1879 a; Dellapé & Carpintero 2012). At the INR, H. argentina was collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, this species was collected in standing water along the vegetated margins of Carambola Stream in northern Iberá, in unshaded places, and in standing or slowmoving water along the margins without aquatic vegetation of Pay Ubre Grande Stream in southern Iberá, in shaded places. This species was also collected from the vegetated margins of Iberá Lagoon and in a swimming pool in Concepción de Yaguareté Corá.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB40D381ADBF8B1116CFE4C.taxon	materials_examined	Material examined. On the road to Itatí RS: 6 ♂, 12 ♀, Mercedes Department, Pay Ubre Grande Stream, Provincial Route 29, 25 km NW Mercedes, 25. ix. 2003; 5 ♂, 2 ♀, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 25 km NW Mercedes, 27. ix. 2003. General distribution. Brazil, Ecuador, Peru, Bolivia, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. Little information exists regarding the habitat associations of this species. It has been collected from a spring-fed pool and temporary rain-water pools (Drake & Hussey 1951), and from a small, isolated puddle and at the base of a waterfall (Pelli et al. 2006). At the INR, specimens were collected at the water-land interface along the margins without aquatic vegetation of Pay Ubre Chico Stream and Pay Ubre Grande Stream, in shaded places.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB40D381ADBF8B1116CFE4C.taxon	discussion	Remarks. The collection of M. braziliensis from INR represents the first record from Corrientes Province.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB70D391ADBFE621658FD80.taxon	materials_examined	Material examined. Galarza RS: 1 ♂, Yacaré Stream, 16. iv. 2013; 1 ♂, 1 ♀, Galarza Lagoon, Vizcaychipi channel, 16. iv. 2013; 1 ♀, Galarza Lagoon, Hermanos Fleita channel, 16. iv. 2013; 4 ♂, 1 ♀, Luna Lagoon, sample 2, 17. iv. 2013; 1 ♂, Luna Lagoon, sample 3, 17. iv. 2013; 1 ♂, Luna Lagoon, sample 4, 17. iv. 2013; 1 ♂, Galarza Lagoon, Hermanos Fleita pier, 17. iv. 2013; 1 ♂, Galarza Lagoon, sample 2, 18. iv. 2013; 1 ♀, Galarza Lagoon, sample 4, 18. iv. 2013. Itatí RS: 2 ♂, 1 ♀, Estancia El Dorado, artificial channel that connects the place of arrival for boats with the Corriente River, 26. ix. 2003; 6 ♂, 15 ♀, Corriente River, 26. ix. 2003; 2 ♀, Itatí Lagoon, 28 ° 41.92 ’ S, 58 ° 6.49 ’ W, 28. iii. 2014; 6 ♂, 10 ♀, Corriente River, 28. iii. 2014; 10 ♂, 10 ♀, Itatí Rincón Island, 28 ° 42.73 ’ S, 58 ° 6.69 ’ W, 29. iii. 2014; 3 ♂, Itatí marsh, 28 ° 42.78 ’ S 58 ° 7.19 ’ W, 29. iii. 2014; 1 ♂, 1 ♀, Potrero Becasina, flood-prone areas in front of the ranger’s house, 28 ° 44.93 ’ S, 58 ° 7.53 ’ W, 30. iii. 2014; 2 ♂, Corriente River, 28 ° 44.18 ’ S, 58 ° 8.70 ’ W, 30. iii. 2014; 1 ♂, Establecimiento El Remanso, permanent pond, 31. iii. 2014; 4 ♂, 2 ♀, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 31. iii. 2014. Laguna Iberá RS: 1 ♀, Iberá Lagoon, sample 1, 2. xii. 2012; 10 ♂, 10 ♀, Iberá Lagoon, Fraga pier, 28 ° 31 ’ 50.00 ’’ S, 57 ° 11 ’ 13.68 ’’ W, 3. xii. 2012; 12 ♂, 15 ♀, Iberá Lagoon, Paso Claro, 28 ° 33 ’ 29 ’’ S, 57 ° 11 ’ 37 ’’ W, 16. ii. 2018. San Ignacio RS: 2 ♂, 2 ♀, Camping Monterrey, Aguará pedestrian path, short walkway, marshes, 27 ° 52.152 ’ S, 56 ° 52.884 ’ W, 2. iii. 2015; 1 ♂, vehicle path, roadside marshland and ditches, 27 ° 54.551 ’ S, 56 ° 53.254 ’ W, 3. iii. 2015; 1 ♂, Camping Monterrey, ditches, 27 ° 52.610 ’ S, 56 ° 52.690 ’ W, 3. iii. 2015; 10 ♂, 10 ♀, Camping Monterrey, Aguará pedestrian path, artificial well, 27 ° 52.286 ’ S, 56 ° 52.767 ’ W, 4. iii. 2015; 1 ♂, 1 ♀, marshlands in front of the ranger’s house, 27 ° 49.413 ’ S, 56 ° 50.929 ’ W, 4. iii. 2015; 1 ♀, gate of “ Las 600 ”, roadside marshlands, 27 ° 50.888 ’ S, 56 ° 53.037 ’ W, 5. iii. 2015; 7 ♂, 5 ♀, vehicle path, roadside marshland and ditches, 27 ° 49 ’ 26.64 ’’ S, 56 ° 50 ’ 52.38 ’’ W, 17. xi. 2018; 4 ♂, 3 ♀, vehicle path, roadside ditches, 27 ° 54 ’ 10.14 ’’ S, 56 ° 53 ’ 14.10 ’’ W, 17. xi. 2018; 4 ♂, 5 ♀, vehicle path, roadside ditches, 27 ° 54 ’ 0.24 ’’ S, 56 ° 53 ’ 6.42 ’’ W, 17. xi. 2018; 24 ♂, 8 ♀, Camping Monterrey, Aguará pedestrian path, marshland, 27 ° 52 ’ 14.10 ’’ S, 56 ° 52 ’ 59.70 ’’ W, 18. xi. 2018; 7 ♂, 6 ♀, Camping Monterrey, Aguará pedestrian path, long walkway, marshes, 27 ° 52 ’ 14.58 ’’ S, 56 ° 52 ’ 59.76 ’’ W, 18. xi. 2018; 2 ♂, 1 ♀, Camping Monterrey, Aguará pedestrian path, pond and flood-prone areas, 27 ° 52 ’ 26.76 ’’ S, 56 ° 52 ’ 48.78 ’’ W, 19. xi. 2018; 2 ♂, 1 ♀, Camping Monterrey, Aguará pedestrian path, pond, 27 ° 52 ’ 17.46 ’’ S, 56 ° 52 ’ 45.18 ’’ W, 19. xi. 2018. San Nicolás RS: 3 ♀, Carambola Stream, 28 ° 12.165 ’ S, 57 ° 26.389 ’ W, 13. xii. 2013; 1 ♂, 1 ♀, Carambola Stream, 28 ° 10.866 ’ S, 57 ° 26.224 ’ W, 14. xii. 2013; 1 ♀, Carambola Stream, 28 ° 10.108 ’ S, 57 ° 25.787 ’ W, 14. xii. 2013; 1 ♂, Carambola Stream, 28 ° 11.067 ’ S, 57 ° 26.567 ’ W, 14. xii. 2013. Yahaveré RS: 3 ♂, Concepción de Yaguareté Corá, route 22, roadside marshes, 28 ° 23 ’ 16.3 ” S, 57 ° 54 ’ 25.6 ” W, 5. xi. 2015; 1 ♂, Paso Cardozo, roadside marshes, 28 ° 23 ’ 47.0 ” S, 57 ° 52 ’ 36.2 ” W, 6. xi. 2015; 2 ♂, Caaby Aguilar, pond, 28 ° 24 ’ 10.4 ” S, 57 ° 51 ’ 17.5 ” W, 6. xi. 2015; 1 ♀, Campo Angelita, roadside marshes, 28 ° 25 ’ 40.9 ” S, 57 ° 49 ’ 12.3 ” W, 6. xi. 2015; 1 ♀, Medina Lagoon, 28 ° 33 ’ 52.6 ” S, 57 ° 45 ’ 28.7 ” W, 7. xi. 2015. On the road to Itatí RS: 1 ♂, 1 ♀, Mercedes Department, Pay Ubre Grande Stream, Provincial Route 29, 25 km NW Mercedes, 25. ix. 2003; 5 ♂, 2 ♀, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 25 km NW Mercedes, 27. ix. 2003; 1 ♂, 2 ♀, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 28. iii. 2014. General distribution. Canada, USA, Mexico, the Greater Antilles, the Lesser Antilles, Brazil, Peru, Argentina (Drake & Hussey 1951; Moreira et al. 2011 b). Habitat. Microvelia hinei is found in a wide range of aquatic habitats. It is usually associated with emergent or floating vegetation and mats of Sphagnum L. moss in standing water (pools, ponds, lakes, swamps, sloughs, marshes, ditches and artificial reservoirs), in unshaded areas (Wilson 1958; Polhemus & Chapman 1979; Bennett & Cook 1981; Vianna & Melo 2003; Pelli et al. 2006), but it has also been collected where vegetation was absent (Wilson 1958) and in shaded areas (Vianna & Melo 2003). It is also recorded from lotic habitats (creeks, streams and rivers) in standing water (Wilson 1958; Bennett & Cook 1981; Pereira & Melo 2007), and brackish pools (Wilson 1958). At the INR, M. hinei was collected from margins with dense floating, emergent and submerged vegetation (mainly Pontederia azurea and Salvinia biloba) and filamentous algae in lentic habitats (Galarza Lagoon, Luna Lagoon, Iberá Lagoon, Medina Lagoon, Itatí Lagoon, ponds, marshlands, ditches and flood-prone areas) and lotic habitats in standing water (Yacaré Stream, Carambola Stream, Corriente River, Pay Ubre Grande Stream, Pay Ubre Chico Stream and artificial channels), mostly in unshaded areas.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB70D391ADBFE621658FD80.taxon	discussion	Remarks. Microvelia hinei is one of the most widespread species in the INR and the most common species of Microvelia in the Reserve. It was often collected together with M. mimula. The collection of this species from INR represents the first record from Corrientes Province. Microvelia hinei was recorded from Argentina without any mention of localities (Coscarón 2017).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB60D3E1ADBFD2E15C7FCF5.taxon	materials_examined	Material examined. Galarza RS: 1 ♂, Galarza Lagoon, Vizcaychipi channel, 16. iv. 2013; 2 ♂, 6 ♀, Luna Lagoon, sample 2, 17. iv. 2013; 2 ♀, Luna Lagoon, sample 3, 17. iv. 2013; 1 ♀, Luna Lagoon, sample 4, 17. iv. 2013; 3 ♀, Luna Lagoon, sample 5, 17. iv. 2013; 5 ♀, marshland in Hermanos Fleita field, 18. iv. 2013; 3 ♂, flood-prone areas in Hermanos Fleita field, 18. iv. 2013; 1 ♂, overflow channel in Hermanos Fleita field, 18. iv. 2013; 1 ♂, 1 ♀, Isirí Stream near Luna Lagoon, 19. iv. 2013. Itatí RS: 1 ♀, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 28. iii. 2014; 4 ♂, 6 ♀, Corriente River, 28 ° 44.18 ’ S, 58 ° 8.70 ’ W, 30. iii. 2014; 1 ♂, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 31. iii. 2014. Laguna Iberá RS: 2 ♂, 1 ♀, Lobo Cuá Stream, 28 ° 32 ’ 52.66 ’’ S, 57 ° 12 ’ 38.56 ’’ W, 2. xii. 2012; 23 ♂, 30 ♀, route 40, roadside pond and ditches, 28 ° 33 ’ 53.90 ’’ S, 57 ° 12 ’ 59.40 ’’ W, 15. ii. 2018; 1 ♂, 3 ♀, Iberá Lagoon, Paso Claro, 28 ° 33 ’ 29 ’’ S, 57 ° 11 ’ 37 ’’ W, 16. ii. 2018; 10 ♂, 16 ♀, route 40, roadside pond, 17. ii. 2018. San Ignacio RS: 1 ♂, vehicle path, roadside ditches, 27 ° 53.263 ’ S, 56 ° 53.125 ’ W, 3. iii. 2015; 1 ♀, Camping Monterrey, Aguará pedestrian path, artificial well, 27 ° 52.286 ’ S, 56 ° 52.767 ’ W, 4. iii. 2015; 4 ♀, Reserva Privada Don Luis, Monte Don Luis, roadside ditches, 27 ° 52.005 ’ S, 56 ° 55.073 ’ W, 4. iii. 2015; 1 ♂, marshlands in front of the ranger’s house, 27 ° 49.413 ’ S, 56 ° 50.929 ’ W, 4. iii. 2015; 7 ♂, 10 ♀, old pine tree forest of “ Las 600 ”, artificial channel, 27 ° 51.834 ’ S, 56 ° 54.285 ’ W, 5. iii. 2015; 27 ♂, 37 ♀, Reserva Privada Don Luis, Monte Don Luis, roadside ditches, 27 ° 52 ’ 0.60 ’’ S, 56 ° 54 ’ 54.18 ’’ W, 16. xi. 2018; 14 ♂, 14 ♀, vehicle path, roadside ditches, 27 ° 54 ’ 10.14 ’’ S, 56 ° 53 ’ 14.10 ’’ W, 17. xi. 2018; 2 ♂, 5 ♀, vehicle path, roadside ditches, 27 ° 54 ’ 0.24 ’’ S, 56 ° 53 ’ 6.42 ’’ W, 17. xi. 2018; 1 ♂, 1 ♀, Camping Monterrey, Aguará pedestrian path, marshland, 27 ° 52 ’ 14.10 ’’ S, 56 ° 52 ’ 59.70 ’’ W, 18. xi. 2018; 1 ♂, 2 ♀, Camping Monterrey, Aguará pedestrian path, long walkway, marshes, 27 ° 52 ’ 14.58 ’’ S, 56 ° 52 ’ 59.76 ’’ W, 18. xi. 2018; 1 ♂, 4 ♀, Camping Monterrey, Aguará pedestrian path, pond and flood-prone areas, 27 ° 52 ’ 26.76 ’’ S, 56 ° 52 ’ 48.78 ’’ W, 19. xi. 2018; 1 ♀, Camping Monterrey, Aguará pedestrian path, pond, 27 ° 52 ’ 17.46 ’’ S, 56 ° 52 ’ 45.18 ’’ W, 19. xi. 2018. San Nicolás RS: 2 ♂, 5 ♀, Carambola Stream, 28 ° 10.108 ’ S, 57 ° 25.787 ’ W, 14. xii. 2013; 1 ♂, marshland next to the barbecue area of the ranger station, 15. xii. 2013; 3 ♀, marshland next to the house for the rangers, 15. xii. 2013. Yahaveré RS: 1 ♀, Concepción de Yaguareté Corá, route 22, roadside marshes, 28 ° 23 ’ 16.3 ” S, 57 ° 54 ’ 25.6 ” W, 5. xi. 2015; 1 ♂, Paso Cardozo, roadside marshes, 28 ° 23 ’ 47.0 ” S, 57 ° 52 ’ 36.2 ” W, 6. xi. 2015; 2 ♀, Caaby Aguilar, pond, 28 ° 24 ’ 06.0 ” S, 57 ° 51 ’ 15.8 ” W, 6. xi. 2015; 2 ♂, 6 ♀, Caaby Aguilar, pond, 28 ° 24 ’ 10.4 ” S, 57 ° 51 ’ 17.5 ” W, 6. xi. 2015; 2 ♂, 2 ♀, Caaby Aguilar, marshes, 28 ° 24 ’ 03.4 ” S, 57 ° 51 ’ 31.3 ” W, 8. xi. 2015; 10 ♂, 10 ♀, Concepción de Yaguareté Corá, house for researchers, swimming pool, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 8. xi. 2015. On the road to Itatí RS: 6 ♂, 5 ♀, Mercedes Department, Pay Ubre Grande Stream, Provincial Route 29, 25 km NW Mercedes, 25. ix. 2003; 14 ♂, 15 ♀, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 25 km NW Mercedes, 27. ix. 2003; 1 ♀, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 28. iii. 2014. General distribution. Costa Rica, Panama, the Greater Antilles, the Lesser Antilles, Colombia, Venezuela, Suriname (as Microvelia amrishi Makhan, 2014), French Guiana, Brazil, Ecuador, Peru, Paraguay, Argentina, Uruguay (Makhan 2014; Cordeiro & Moreira 2015; Moreno-R et al. 2018; Motta et al. 2018). Habitat. Microvelia mimula lives in a wide range of aquatic habitats. It was found at the margins of unshaded pools of various sizes (including urban rain pools without aquatic vegetation and artificial ones), ponds, lakes, lagoons, marshlands, ditches and drains, with sparse or dense vegetation (Hynes 1948; Torres et al. 2007; Fontanarrosa et al. 2009; Muñoz Riviaux et al. 2010; Rodrigues et al. 2021 a), and along the almost always vegetated margins of unshaded and shaded streams and rivers in standing or slow-moving water (Fernández & López Ruf 2006; Pereira & Melo 2007; Torres et al. 2007; Muñoz Riviaux et al. 2010). This species has also been taken at lights (White 1879 a, b; McKinstry 1937). At the INR, M. mimula was collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, this species was collected from margins with dense floating, emergent and submerged vegetation and filamentous algae in lentic habitats (Galarza Lagoon, Luna Lagoon, Iberá Lagoon, ponds, artificial wells, marshlands, roadside ditches and flood-prone areas) and lotic habitats (Isirí Stream, Carambola Stream, Lobo Cuá Stream, Corriente River and artificial channels), in unshaded areas. This species was also found in shaded habitats in standing or slow-moving water along the margins without aquatic vegetation of Pay Ubre Grande Stream and Pay Ubre Chico Stream, and at the margins of ponds, marshlands and roadside ditches with or without aquatic vegetation. Some specimens were collected in a swimming pool in Concepción de Yaguareté Corá.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB60D3E1ADBFD2E15C7FCF5.taxon	discussion	Remarks. Microvelia mimula is one of the most widespread species of water bugs in the INR. It was often collected together with M. hinei.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB10D3E1ADBFCFA1062F9AA.taxon	materials_examined	Material examined. Laguna Iberá RS: 4 ♂, 4 ♀, Iberá Lagoon, Fraga pier, 28 ° 31 ’ 50.00 ’’ S, 57 ° 11 ’ 13.68 ’’ W, 3. xii. 2012. Yahaveré RS: 1 ♀, Concepción de Yaguareté Corá, house for researchers, swimming pool, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 8. xi. 2015. General distribution. Canada, USA, Mexico, Guatemala, Costa Rica, Panama, the Greater Antilles, the Lesser Antilles, Colombia, Venezuela, French Guiana, Brazil, Ecuador, Peru, Argentina (Moreira et al. 2011 b; Pacheco-Chaves et al. 2014; Motta et al. 2018). Habitat. Microvelia pulchella lives in a wide range of aquatic habitats. It is usually associated with dense vegetation in unshaded areas of lentic habitats (ponds, lakes, puddles in drains, pools by waterfalls, lagoons, roadside ditches, sloughs, fens, swamps, marshes and dams) (Nieser & Alkins-Koo 1991; Taylor & McPherson 1999; Pelli et al. 2006; Franco et al. 2021; Rodrigues et al. 2021 b) and of lotic habitats (streams and rivers) in standing or slowmoving water (Melo & Nieser 2004; Pereira & Melo 2007; Moreno-R et al. 2018; Franco et al. 2021; Rodrigues et al. 2021 b). It has also been found on brackish water in the Lesser Antilles (Cobben 1960) and in a swimming pool (Melo & Nieser 2004). This species can live in pools in caves in complete darkness in Cuba (Nieser 1973). At the INR, specimens were collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, this species was collected together with M. hinei from margins with dense floating, emergent and submerged vegetation in Iberá Lagoon. One specimen was collected together with M. mimula in a swimming pool in Concepción de Yaguareté Corá.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB10D3F1ADBF9001732FE84.taxon	materials_examined	Material examined. On the road to Itatí RS: 1 ♀, Mercedes Department, Pay Ubre Grande Stream, Provincial Route 29, 25 km NW Mercedes, 25. ix. 2003; 8 ♂, 4 ♀, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 25 km NW Mercedes, 27. ix. 2003. General distribution. Colombia, Brazil, Peru, Paraguay, Argentina (Molano et al. 2016). Habitat. This species is usually found along the vegetated margins of streams and rivers in standing or slowmoving water and in flood-prone areas of streams in shaded areas (Torres et al. 2007; Rodrigues et al. 2021 b), but it has also been collected where vegetation was absent in unshaded areas (Torres et al. 2007), and in pools along dry streams (Dias-Silva et al. 2013). It has also been found in puddles and ponds (Pereira & Melo 2007). At the INR, specimens were collected in standing or slow-moving water along the margins without aquatic vegetation of Pay Ubre Chico Stream and Pay Ubre Grande Stream, in shaded places.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB10D3F1ADBF9001732FE84.taxon	discussion	Remarks. The collection of M. venustatis from INR represents the first record from Corrientes Province. This species was collected together with M. hinei and M. mimula.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB00D3F1ADBFE2A1063FB3F.taxon	description	(Fig. 21)	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB00D3F1ADBFE2A1063FB3F.taxon	materials_examined	Material examined. Itatí RS: 1 ♂, Corriente River, 28 ° 44.18 ’ S, 58 ° 8.70 ’ W, 30. iii. 2014. General distribution. Brazil (Rodrigues et al. 2014). La Plata (Argentina?) (Coscarón 2017). Argentina: Corrientes (this work). Habitat. Very little information exists regarding the biology of P. rotundanotata. Hungerford (1930) described this species from “ La Plata ” and Brazil (Minas Gerais state) without any mention of habitat characteristics. This species has been recorded from a river (Rodrigues et al. 2014). At the INR, only one specimen of P. rotundanotata was collected in the Corriente River, in open water surface beside emergent vegetation, in shaded places (Fig. 12).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB00D3F1ADBFE2A1063FB3F.taxon	discussion	Remarks. The genus Paravelia contains 49 species, all of which are confined to the Neotropical region (Polhemus et al. 2019; Polhemus 2021). So far, only four species of Paravelia had been recorded from Argentina (Coscarón 2017). The collection of P. rotundanotata from INR represents the first reliable record from Argentina, as this species was described by Hungerford (1930) from “ La Plata ” (and Brazil) without any mention of the country, and the first record of the genus Paravelia from Corrientes Province. This record extends the known range of this species from central-west and southeast Brazil to northeastern Argentina. The following combination of characters distinguishes P. rotundanotata from P. anta Mazzucconi, 2000, P. paxilla (Drake, 1957), and P. platensis (Berg, 1879) from Argentina: head, thorax and abdominal laterotergites with small dark spinules; antennae dark, with segment IV noticeably lighter; and males with a distinct horn-like expansion basally on the proctiger.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB00D3C1ADBFAB310AEFEFD.taxon	description	(Fig. 22)	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB00D3C1ADBFAB310AEFEFD.taxon	materials_examined	Material examined. Laguna Iberá RS: 2 ♀, route 40, roadside pond, 17. ii. 2018. San Ignacio RS: 1 ♀, Camping Monterrey, Aguará pedestrian path, long walkway, flood-prone areas, 27 ° 52.213 ’ S, 56 ° 52.977 ’ W, 2. iii. 2015; 1 ♀, Reserva Privada Don Luis, Monte Don Luis, ditches, 27 ° 52.015 ’ S, 56 ° 54.914 ’ W, 5. iii. 2015; 1 ♀, Reserva Privada Don Luis, Monte Don Luis, roadside ditches, 27 ° 52 ’ 0.60 ’’ S, 56 ° 54 ’ 54.18 ’’ W, 16. xi. 2018; 1 ♂, Camping Monterrey, Aguará pedestrian path, long walkway, marshes, 27 ° 52 ’ 14.58 ’’ S, 56 ° 52 ’ 59.76 ’’ W, 18. xi. 2018. Yahaveré RS: 1 ♀, Caaby Aguilar, pond, 28 ° 24 ’ 10.4 ” S, 57 ° 51 ’ 17.5 ” W, 6. xi. 2015; 1 ♂, 2 ♀, Caaby Aguilar, marshes, 28 ° 24 ’ 03.4 ” S, 57 ° 51 ’ 31.3 ” W, 8. xi. 2015. General distribution. Brazil (Moreira et al. 2020). Argentina: Corrientes (this work). Habitat. Knowledge regarding this species is based on only three specimens, including the holotype. Nothing is known about its habitat associations except that it was found in Lago da Marchantaria in Amazonas State, Brazil (Rodrigues & Álvarez Arango 2019). At the INR, S. vinnula was found in marshes (Fig. 13), flood-prone areas, roadside ditches and ponds, in open water surface beside emergent vegetation, in shaded places.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB00D3C1ADBFAB310AEFEFD.taxon	discussion	Remarks. The American genus Steinovelia includes four species (Moreira et al. 2020). Previously to this paper, only S. virgata had been recorded from Argentina (Coscarón 2017). The collection of S. vinnula from INR extends the known range of this species from southeast Brazil to northeastern Argentina. The shape of the posterior femora, enlarged in S. vinnula and slender in S. virgata, unambiguously differentiate these two species.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB30D3C1ADBFEF21572FBA9.taxon	materials_examined	Material examined. Laguna Iberá RS: 1 ♀, Iberá Lagoon, sample 2, 2. xii. 2012; 1 ♀, Colonia Carlos Pellegrini, light trap, 2. xii. 2012. Yahaveré RS: 4 ♂, 1 ♀, Concepción de Yaguareté Corá, house for researchers, swimming pool, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 8. xi. 2015; 2 ♂, Concepción de Yaguareté Corá, house for researchers, light trap, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 6 – 7. xi. 2015. General distribution. Trinidad & Tobago, Colombia, Brazil, Peru, Bolivia, Paraguay, Argentina (Aristizábal-García 2017; Floriano et al. 2017; Moreira et al. 2020). Habitat. Very little information exists regarding the biology of S. virgata. It has been collected from roadside ditches (Nieser & Alkins-Koo 1991), at the margins of unshaded marshlands with dense vegetation (Torres et al. 2007), and in a lake and a tributary of a river (Moreira et al. 2020). This species has also been taken at lights (White 1879 b; Torres et al. 2007; Moreira et al. 2020). At the INR, specimens were collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, this species was collected in the Iberá Lagoon from habitats similar to those mentioned above. Three specimens were also taken at lights in Colonia Carlos Pellegrini and Concepción de Yaguareté Corá, and five specimens were collected in a swimming pool in Concepción de Yaguareté Corá.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB30D3D1ADBF99E113CFEA0.taxon	materials_examined	Material examined. On the road to Itatí RS: 31 ♂, 26 ♀, Mercedes Department, Pay Ubre Grande Stream, Provincial Route 29, 25 km NW Mercedes, 25. ix. 2003; 19 ♂, 12 ♀, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 25 km NW Mercedes, 27. ix. 2003; 2 ♀, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 28. iii. 2014. General distribution. Brazil, Argentina (Cordeiro & Moreira 2015). Habitat. This species has usually been found in streams without aquatic vegetation, in slow-moving water and in shaded areas (Nieser & Melo 1997; Melo & Nieser 2004; Pelli et al. 2006; Torres et al. 2007), but it has also been collected in rivers and stagnant waterbodies connected to lotic ones (reservoirs and pools connected to streams; ponds at waterfall bases) in shaded areas (Vianna & Melo 2003; Pelli et al. 2006), in a stream with aquatic vegetation (Souza et al. 2006), and in a stream and overflow path in agricultural fields mostly exposed to sunlight (Melo & Nieser 2004). This species has also been found in streams with gallery forests that run along their margins (Pelli et al. 2006). At the INR, specimens were collected in standing and slow-moving water along the margins with gallery forests of Pay Ubre Chico Stream and Pay Ubre Grande Stream, in shaded places without aquatic vegetation.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB30D3D1ADBF99E113CFEA0.taxon	discussion	Remarks. The collection of B. furva from INR represents the first record from Corrientes Province.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB20D3D1ADBFE0E1088FBAF.taxon	materials_examined	Material examined. Laguna Iberá RS: 4 ♂, 3 ♀, Iberá Lagoon, 3. xii. 2012. On the road to Itatí RS: 1 ♀, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 28. iii. 2014. General distribution. Brazil, Peru, Paraguay, Argentina, Uruguay (Nieser & Melo 1997; Floriano et al. 2017). Habitat. This species has been found in streams and rivers which are slow to moderately fast-flowing, with or without aquatic vegetation, with or without gallery forests and in shaded or unshaded areas (Mazzucconi & Bachmann 1995, 2003; Fernández & López Ruf 2006; Pelli et al. 2006; Torres et al. 2007), but it has also been collected in stagnant waterbodies connected to lotic ones (overflows of rivers; pools connected to streams; ponds at waterfall bases) (Mazzucconi & Bachmann 1995; Pelli et al. 2006; Franco et al. 2020). Halobatopsis platensis has also been recorded from ponds and small lakes and from a lagoon exposed to sunlight and with aquatic vegetation (Pelli et al. 2006; Torres et al. 2007). At the INR, specimens were collected in standing and slow-moving water along the margins with gallery forests and without aquatic vegetation of Pay Ubre Chico Stream, in shaded places, and from the margins of the Iberá Lagoon, exposed to sunlight and with emergent and floating vegetation.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB20D3D1ADBFE0E1088FBAF.taxon	discussion	Remarks. This is the first record of H. platensis from INR. This species was previously recorded from Corrientes Province by Bachmann (1966 b), Mazzucconi & Bachmann (1995) and Mazzucconi (1999).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB20D3D1ADBFB3C14D2F8F8.taxon	materials_examined	Material examined. Yahaveré RS: 1 ♂, 1 ♀, Concepción de Yaguareté Corá, house for researchers, swimming pool, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 8. xi. 2015. General distribution. Panama, the Lesser Antilles, Colombia, Venezuela, Guyana, Suriname, Brazil, Ecuador, Peru, Bolivia, Paraguay, Argentina (Floriano et al. 2017). Habitat. Limnogonus a. aduncus has usually been found in the margins of pools, ponds and lagoons exposed to sunlight and with floating, emergent or submerged vegetation (Melo & Nieser 2004; Pereira & Melo 2007; Molano-Rendón et al. 2008; Torres et al. 2008; Moreira et al. 2011 a), as well as in stagnant waterbodies near lotic habitats (overflows of streams; pools on banks of rivers; pools along dry streams) (Roback 1966; Melo & Nieser 2004; Moreno-R et al. 2018). This subspecies has also been collected in streams and rivers which are slow to moderately fast-flowing, with or without aquatic vegetation and in shaded or unshaded areas (Mazzucconi & Bachmann 1995; Melo & Nieser 2004; Pereira & Melo 2007; Moreno-R et al. 2018; Rodrigues et al. 2021 b). At the INR, only two specimens were collected in a swimming pool in Concepción de Yaguareté Corá.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFB20D3D1ADBFB3C14D2F8F8.taxon	discussion	Remarks. The collection of L. aduncus aduncus from INR represents the first record from Corrientes Province.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAD0D221ADBFF0B14C7FC02.taxon	materials_examined	Material examined. Galarza RS: 10 ♂, 10 ♀, flood-prone areas in Hermanos Fleita field, 18 – 19. iv. 2013. Itatí RS: 1 ♂, Itatí marsh, Itatí Rincón Island, 28 ° 42.73 ’ S, 58 ° 6.69 ’ W, 29. iii. 2014; 1 ♂, Estancia El Dorado, pond, 28 ° 45.13 ’ S, 58 ° 7.40 ’ W, 30. iii. 2014. Laguna Iberá RS: 1 ♀, route 40, roadside pond and ditches, 28 ° 33 ’ 53.90 ’’ S, 57 ° 12 ’ 59.40 ’’ W, 15. ii. 2018; 1 ♂, route 40, roadside pond, 17. ii. 2018. San Ignacio RS: 1 ♂, 2 ♀, vehicle path, roadside ditches, 27 ° 54.444 ’ S, 56 ° 53.319 ’ W, 3. iii. 2015; 1 ♀, old pine tree forest of “ Las 600 ”, artificial channel, 27 ° 51.834 ’ S, 56 ° 54.285 ’ W, 5. iii. 2015. Yahaveré RS: 3 ♂, 2 ♀, Carambola Stream, 28 ° 29 ’ 48.8 ” S, 57 ° 41 ’ 09.6 ” W, 7. xi. 2015. General distribution. Colombia, Venezuela, Guyana, Suriname, French Guiana, Brazil, Peru, Bolivia, Paraguay, Argentina, Uruguay (Damgaard et al. 2014; Motta et al. 2018; Morales et al. 2021). Habitat. This species has been found in pools, ponds, lagoons, marshlands and ditches exposed to sunlight and with floating and emergent vegetation (Mazzucconi & Bachman 1995; Torres et al. 2007), stagnant pools along dry streams (Melo & Nieser 2004), and streams (Aristizábal-García 2002; Mazzucconi & Bachmann 2003). This pioneer species readily colonizes all kinds of stagnant waterbodies, including temporary, semipermanent, and artificial ones: rainwater accumulated in horse footprints, drinking troughs for livestock, swimming pools, and urban rain pools (Mazzucconi & Bachman 1995; Fontanarrosa et al. 2009). At the INR, L. ignotus was collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, this species was collected on the water surface beside floating and emergent vegetation at the margins of lentic habitats (Itatí marsh, ponds and flood-prone areas) and lotic habitats in standing water (Carambola Stream, roadside ditches and artificial channels), mostly in unshaded areas.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAD0D221ADBFBA81033F911.taxon	description	(Fig. 19)	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAD0D221ADBFBA81033F911.taxon	materials_examined	Material examined. San Ignacio RS: 2 ♂, 3 ♀, Reserva Privada Don Luis, Monte Don Luis, roadside ditches, 27 ° 52.015 ’ S, 56 ° 54.914 ’ W, 5. iii. 2015. General distribution. Paraguay (Damgaard et al. 2014). Argentina: Corrientes (this work). Habitat. Knowledge regarding N. celeris is based only on the type series from Paraguay (Nieser 1994). Nothing is known about its habitat associations except that it was found in a marsh in Villarrica (Drake & Harris 1934). At the INR, this species was collected from a single locality: a shaded roadside ditch with floating vegetation at the margins (Fig. 14).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAD0D221ADBFBA81033F911.taxon	discussion	Remarks. The cosmopolitan genus Neogerris currently comprises 13 species (Damgaard et al. 2014). Until now, only N. lubricus had been recorded from Argentina (Coscarón 2017). The collection of N. celeris from INR extends the known range of this species from southern Paraguay to northeastern Argentina. Nieser (1994) restricted the geographical distribution of N. celeris to its type-locality in Paraguay as this species can be misidentified with N. lotus (White, 1879) due to variations in the pronotum length. Therefore, records of N. celeris from other countries are not considered here. The posterior margin of abdominal tergum VIII, which is deeply notched in N. celeris but hardly notched in N. lubricus, readily differentiates the males of these two species.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAD0D231ADBF8DE1696FDDC.taxon	description	At the INR, specimens were collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAC0D231ADBFD13118CFA01.taxon	description	(Fig. 20)	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAC0D231ADBFD13118CFA01.taxon	materials_examined	Material examined. Laguna Iberá RS: 3 ♀, artificial channel, 16. ii. 2018. San Ignacio RS: 1 ♀, vehicle path, roadside marshland and ditches, 27 ° 49 ’ 26.64 ’’ S, 56 ° 50 ’ 52.38 ’’ W, 17. xi. 2018; 4 ♂, 12 ♀, Camping Monterrey, Aguará pedestrian path, marshland, 27 ° 52 ’ 14.10 ’’ S, 56 ° 52 ’ 59.70 ’’ W, 18. xi. 2018; 3 ♂, 6 ♀, Camping Monterrey, Aguará pedestrian path, long walkway, marshes, 27 ° 52 ’ 14.58 ’’ S, 56 ° 52 ’ 59.76 ’’ W, 18. xi. 2018; 1 ♂, 3 ♀, Camping Monterrey, Aguará pedestrian path, flood-prone areas, 27 ° 52 ’ 22.08 ’’ S, 56 ° 52 ’ 57.84 ’’ W, 19. xi. 2018. General distribution. Colombia, Brazil, Bolivia (Floriano et al. 2017; Moreno-R et al. 2018). Argentina: Corrientes (this work). Habitat. This species has been found in pools, ponds, lakes, and streams and rivers which are slow to moderately fast-flowing (Nieser 1970 b; Pereira & Melo 2007; Moreira et al. 2011 a; Moreno-R et al. 2018; Rodrigues et al. 2021 b). At the INR, O. obesa was collected from the densely vegetated margins of sunny marshlands (Fig. 15), marshes and flood-prone areas (Fig. 16). Occasionally this species was found in moderately shaded margins of ditches and artificial channels.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAC0D231ADBFD13118CFA01.taxon	discussion	Remarks. The neotropical genus Ovatametra includes eight species (Polhemus & Polhemus 1995). So far, only O. gualeguay Bachmann had been recorded from Argentina (Coscarón 2017). The collection of O. obesa from INR extends the known range of this species from eastern Brazil and Bolivia to northeastern Argentina. The color pattern of the mesonotum in apterous females, with a large oval yellow spot surrounded by black on each side of the median dark band in O. obesa and a longitudinal yellow band on each side of the median dark band in O. gualeguay, differentiate the two species. Both species share the presence of a tuft of setae medially on abdominal tergum VII.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAC0D201ADBF9AD14F6FE4C.taxon	materials_examined	Material examined. On the road to Itatí RS: 1 ♀, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 28. iii. 2014. General distribution. Brazil, Peru, Bolivia, Paraguay, Argentina, Uruguay (Cordeiro & Moreira 2015). Habitat. This species has been found in streams that are slow-flowing, with or without floating and emergent vegetation, with or without gallery forests, and in shaded or unshaded areas (Fernández & López Ruf 2006; Torres et al. 2007). It has also been collected in slow-flowing rivers, artificial reservoirs with marginal vegetation, shaded pools without aquatic vegetation, and shaded ponds with marginal vegetation caused by overflowing of streams (Mazzucconi & Bachmann 1995; Neri et al. 2005; Torres et al. 2007; Franco et al. 2021). At the INR, specimens were collected in standing and slow-moving water along the margins with gallery forests and without aquatic vegetation of Pay Ubre Chico Stream, in shaded places.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAC0D201ADBF9AD14F6FE4C.taxon	discussion	Remarks. This is the first record of R. bonariensis from INR. This species was previously recorded from Corrientes Province by Bachmann (1966 b), Mazzucconi & Bachmann (1995), Mazzucconi (1999) and Crespo & Iglesias (2001). Rheumatobates bonariensis was recorded from Córdoba by Corigliano et al. (1996) and Chaco, Formosa and Salta by Aristizábal-García (2002), based on Bachmann (1966 b). These records are herein considered erroneous, because they are not mentioned in Bachmann (1966 b). These erroneous records were repeated by Coscarón (2017).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAF0D201ADBF89816CCF816.taxon	discussion	Two genera with 12 described species are known to occur in Argentina (Coscarón 2017). Poi de Neiff (1984, 1993, 2003) and Estévez e t al. (2003) previously reported three species from INR. During this study, we collected these species and another three, including one new country record for Argentina: Curicta granulosa. Ranatra heydeni Montandon, 1909, reported from Corrientes Province (Montandon 1909; Pennington 1920 – 1921; De Carlo 1946, 1959, 1964 a, 1973), has not been collected in INR.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAF0D201ADBFE6210F2FBEA.taxon	materials_examined	Material examined. Galarza RS: 2 ♂, 3 ♀, overflow channel in Hermanos Fleita field, 18. iv. 2013. General distribution. Panama, Colombia, Brazil, Bolivia, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. This species has been found in slow to moderately fast-flowing streams with or without aquatic vegetation, rivers, ponds, lagoons and lakes (Hungerford 1954; Mazzucconi & Bachmann 1995; Aristizábal-García 2002; Souza et al. 2006; Molano-Rendón et al. 2008; Moreira et al. 2011 c; Dias-Silva et al. 2013). Rheumatobates c. crassifemur has also been collected on quiet brackish waters of pools at the mouth of streams emptying into the sea in Panama (Drake & Hottes 1951). At the INR, this species was collected from the margins of overflow channels with dense emergent and submerged vegetation.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAF0D201ADBFE6210F2FBEA.taxon	discussion	Remarks. This is the first record of R. c. crassifemur from INR. This species was previously recorded from Corrientes Province by Bachmann (1966 b), Mazzucconi & Bachmann (1995), and Mazzucconi (1999).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAF0D201ADBFBC110C4F98B.taxon	materials_examined	Material examined. San Ignacio RS: 15 ♂, 4 ♀, Camping Monterrey, Aguará pedestrian path, long walkway, marshes, 27 ° 52 ’ 14.58 ’’ S, 56 ° 52 ’ 59.76 ’’ W, 18. xi. 2018. General distribution. Costa Rica, Panama, Colombia, Brazil, Peru, Bolivia, Argentina (Moreira et al. 2011 b; Molano-Rendón et al. 2018). Habitat. This subspecies has been found in bogs, pools, ponds, lagoons, rivers and fast-flowing streams (Hungerford 1954; Mazzucconi 1999; Melo & Nieser 2004; Molano-Rendón et al. 2018; Pacheco-Chaves et al. 2018; Rodrigues et al. 2021 b). It has also been recorded from salt pools in Peru (Hungerford 1954). At the INR, R. minutus flavidus was collected from the shaded margins of marshes with dense floating and emergent vegetation.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAF0D201ADBFBC110C4F98B.taxon	discussion	Remarks. This is the first record of R. minutus flavidus from INR. This species was previously recorded from Corrientes Province by Mazzucconi (1999), López Ruf et al. (2003), and Mazzucconi et al. (2009).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA90D261ADBFF0B171BFD45.taxon	materials_examined	Material examined. Itatí RS: 1 ♂, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 28. iii. 2014. San Ignacio RS: 1 ♀, vehicle path, roadside marshland and ditches, 27 ° 54.551 ’ S, 56 ° 53.254 ’ W, 3. iii. 2015. General distribution. Brazil, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. Little information exists regarding the habitat associations of C. borellii. This species has been collected from lagoons, streams and rivers (Keffer 1997). It has been reported living at the margins of unshaded ponds and marshlands with muddy bottoms and with dense vegetation and plant debris (Torres et al. 2007). At the INR, specimens were found at the margins of ponds, marshlands, and ditches, exposed to sunlight and with dense emergent and floating vegetation.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA90D261ADBFF0B171BFD45.taxon	discussion	Remarks. This is the first record of C. borellii from INR. This species was previously recorded from Corrientes Province by Keffer (1997), as Curicta carinata De Carlo, 1951 by De Carlo (1951), and as Curicta sanmartini De Carlo, 1958 by De Carlo (1958) and Bachmann (1999).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA90D261ADBFD6A1141FA73.taxon	description	(Fig. 18)	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA90D261ADBFD6A1141FA73.taxon	materials_examined	Material examined. Laguna Iberá RS: 1 ♂, 1 ♀, Lobo Cuá Stream, 28 ° 32 ’ 37.14 ’’ S, 57 ° 12 ’ 3.89 ’’ W, 2. xii. 2012. General distribution. Colombia, Venezuela, Brazil, Peru, Bolivia, Paraguay (Moreira et al. 2011 b). Argentina: Corrientes (this work). Habitat. This species has been collected from pools, marshy ponds, lagoons and ditches with marginal floating vegetation and bottons with plant debris, and from rivers (Roback & Nieser 1974; Keffer 1997; Melo & Nieser 2004). At the INR, specimens of C. granulosa were collected from the margins of the Lobo Cuá Stream, exposed to sunlight and with dense vegetation (Fig. 17).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA90D261ADBFD6A1141FA73.taxon	discussion	Remarks. The neotropical waterscorpion genus Curicta includes 16 species (Keffer 1997), five of which occur in Argentina (Coscarón 2017). The collection of C. granulosa from INR represents the first record from this country, and extends the known range of this species from Paraguay to northeastern Argentina. The following combination of characters distinguishes C. granulosa from C. bonaerensis (Berg, 1879), C. borelli, C. carinata Kuitert, 1949, C. grandis De Carlo, 1951 and C. pelleranoi from Argentina: profemoral sulcus with two teeth on either side and with sulcal teeth distally; vertex usually with pronounced carina; and protibia usually with a dark, medial annulus.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA90D271ADBFA7816B3FF1B.taxon	materials_examined	Material examined. Galarza RS: 1 ♂, Isirí Stream near Luna Lagoon, 19. iv. 2013. Laguna Iberá RS: 1 ♀, Baletón San Pedro, 3. xii. 2012; 1 ♀, route 40, roadside pond, 17. ii. 2018. San Ignacio RS: 1 ♀, vehicle path, roadside ditches, 27 ° 54 ’ 10.14 ’’ S, 56 ° 53 ’ 14.10 ’’ W, 17. xi. 2018. San Nicolás RS: 2 ♀, Carambola Stream, 28 ° 12.302 ’ S, 57 ° 26.300 ’ W, 13. xii. 2013; 4 ♂, 1 ♀, Carambola Stream, 28 ° 10.866 ’ S, 57 ° 26.224 ’ W, 14. xii. 2013; 1 ♂, Carambola Stream, 28 ° 10.108 ’ S, 57 ° 25.787 ’ W, 14. xii. 2013. Yahaveré RS: 1 ♀, Campo Angelita, roadside marshes, 28 ° 25 ’ 40.9 ” S, 57 ° 49 ’ 12.3 ” W, 6. xi. 2015. General distribution. Brazil, Argentina (Moreira et al. 2011 b). Habitat. Little information exists regarding the habitat associations of C. pelleranoi. This species has been found in Iberá in association with Leersia hexandra Sw., and Cabomba caroliniana (in channels between marshes) (Poi de Neiff 1984, 1993, 2003). During the present study, C. pelleranoi was collected from the unshaded margins with dense floating, emergent, and submerged vegetation (mainly Ludwigia peploides, Cabomba caroliniana, Pontederia azurea, P. crassipes Mart., Myriophyllum aquaticum, Azolla filiculoides, Pontederia cordata L., Leersia hexandra and Salvinia biloba), and organic debris of lentic habitats (ponds and marshes) and lotic habitats (Carambola Stream, Isirí Stream and roadside ditches).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA80D271ADBFED71546FCB6.taxon	materials_examined	Material examined. San Ignacio RS: 1 ♂, 1 ♀, vehicle path, roadside ditches, 27 ° 54 ’ 0.24 ’’ S, 56 ° 53 ’ 6.42 ’’ W, 17. xi. 2018; 1 ♂, 1 ♀, Camping Monterrey, Aguará pedestrian path, marshland, 27 ° 52 ’ 14.10 ’’ S, 56 ° 52 ’ 59.70 ’’ W, 18. xi. 2018. General distribution. Brazil, Paraguay, Argentina, Uruguay (De Carlo 1946; Moreira et al. 2011 b). Habitat. Little information exists regarding the habitat associations of this species. It has been recorded only from rivers (White 1879 a; Montandon 1895). At the INR, R. rabida was collected from the unshaded margins of marshlands and roadside ditches with dense floating, emergent, and submerged vegetation.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA80D271ADBFED71546FCB6.taxon	discussion	Remarks. This is the first record of R. rabida from INR. It was collected together with R. sjostedti. This species was previously recorded from Corrientes Province by De Carlo (1946, 1959, 1964 a, 1973), Nieser (1975) and López Ruf et al. (2003).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA80D271ADBFC361026F91B.taxon	materials_examined	Material examined. Galarza RS: 1 ♂, Luna Lagoon, sample 1, 17. iv. 2013. Itatí RS: 1 ♂, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 28. iii. 2014. Laguna Iberá RS: 2 ♂, Lobo Cuá marsh, 28 ° 32 ’ 37.14 ’’ S, 57 ° 12 ’ 3.89 ’’ W, 2. xii. 2012; 3 ♂, 5 ♀, Iberá Lagoon, Fraga pier, 28 ° 31 ’ 50.00 ’’ S, 57 ° 11 ’ 13.68 ’’ W, 3. xii. 2012; 1 ♂, 1 ♀, Iberá Lagoon, 28 ° 31 ’ 36.54 ’’ S, 57 ° 8 ’ 45.91 ’’ W, 3. xii. 2012; 1 ♂, 4 ♀, Iberá Lagoon, sample 2, 2. xii. 2012; 1 ♀, Baletón San Pedro, 3. xii. 2012; 3 ♂, 6 ♀, rice channel, 3. xii. 2012; 1 ♀, route 40, roadside pond, 17. ii. 2018. San Ignacio RS: 1 ♀, vehicle path, roadside marshland and ditches, 27 ° 54.551 ’ S, 56 ° 53.254 ’ W, 3. iii. 2015; 1 ♂, vehicle path, roadside marshland and ditches, 27 ° 49 ’ 26.64 ’’ S, 56 ° 50 ’ 52.38 ’’ W, 17. xi. 2018. San Nicolás RS: 1 ♂, Carambola Stream, 28 ° 11.878 ’ S, 57 ° 26.350 ’ W, 13. xii. 2013; 1 ♂, Carambola Stream, 28 ° 11.871 ’ S, 57 ° 26.292 ’ W, 13. xii. 2013; 1 ♂, Carambola Stream, 28 ° 10.866 ’ S, 57 ° 26.224 ’ W, 14. xii. 2013; 1 ♂, 1 ♀, marshland next to the house for the rangers, 15. xii. 2013. General distribution. Venezuela, Brazil, Bolivia, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. Little information exists regarding the habitat associations of this species. It is known from rivers (Nieser 1975) and the margins of unshaded marshlands with muddy bottoms and with dense vegetation and plant debris (Torres et al. 2007). At the INR, R. signoreti was collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, this species was collected from the unshaded margins with dense floating and emergent vegetation, and organic debris of lentic habitats (Luna Lagoon, Iberá Lagoon, Lobo Cuá marsh, Baletón San Pedro, marshlands and ponds) and lotic habitats (Carambola Stream, roadside ditches and rice channels).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA80D271ADBFC361026F91B.taxon	discussion	Remarks. Ranatra signoreti was very often collected together with R. sjostedti.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA80D241ADBF8D0107EFD11.taxon	materials_examined	Material examined. Laguna Iberá RS: 1 ♀, 1 – 3. xii. 2012; 3 ♂, 2 ♀, route 40, roadside pond and ditches, 28 ° 33 ’ 53.90 ’’ S, 57 ° 12 ’ 59.40 ’’ W, 15. ii. 2018; 5 ♂, 2 ♀, route 40, roadside pond, 17. ii. 2018. San Ignacio RS: 1 ♀, Reserva Privada Don Luis, Monte Don Luis, roadside pond, 27 ° 52 ’ 0.60 ’’ S, 56 ° 54 ’ 54.18 ’’ W, 16. xi. 2018; 1 ♀, Camping Monterrey, Aguará pedestrian path, marshland, 27 ° 52 ’ 14.10 ’’ S, 56 ° 52 ’ 59.70 ’’ W, 18. xi. 2018. San Nicolás RS: 1 ♀, Carambola Stream, 28 ° 11.067 ’ S, 57 ° 26.567 ’ W, 14. xii. 2013; 2 ♀, marshland next to the house for the rangers, 15. xii. 2013. General distribution. Brazil, Argentina, Uruguay (Moreira et al. 2011 b). Habitat. Ranatra sjostedti has been found in lagoons and marshes with floating vegetation and in urban rain pools without aquatic vegetation (Neiff & Poi de Neiff 1979; Poi de Neiff 1981; Bruquetas de Zozaya 1986; Fontanarrosa et al. 2009). This species has also been collected from shaded streams that are slow-flowing, with floating and emergent vegetation, and with gallery forests that run along their margins, and in river floodplains (Poi de Neiff & Neiff 2006; Torres et al. 2007). It has been found in association with Pontederia crassipes, Lemna sp. and Paspalum repens Bergius (Neiff & Poi de Neiff 1979; Bruquetas de Zozaya 1986; Poi de Neiff & Neiff 2006). At the INR, R. sjostedti was collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, this species was collected from the unshaded margins with dense floating, emergent, and submerged vegetation of marshlands, ponds, roadside ditches and the Carambola Stream.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA80D241ADBF8D0107EFD11.taxon	discussion	Remarks. Ranatra sjostedti was collected together with R. rabida and R. signoreti.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAB0D241ADBF9C610C4F86E.taxon	description	Habitat. Belostoma bosqi has been found in lakes, lagoons and rivers (Menke & Lauck 1962; Lauck 1964; Nieser 1975; Poi de Neiff 1984; Ribeiro 2007). It has also been taken at lights (Ribeiro 2007). This species has been found in Iberá in association with Leersia hexandra (Poi de Neiff 1984, 2003).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAB0D241ADBF9C610C4F86E.taxon	discussion	Remarks. This species was first recorded from INR (Galarza Lagoon) by Poi de Neiff (1984).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAA0D251ADBFF0B1537FD61.taxon	materials_examined	Material examined. Galarza RS: 1 ♀, 16 – 19. iv. 2013. Itatí RS: 1 ♂, 28 – 31. iii. 2014. Laguna Iberá RS: 1 ♂, 30. xi – 4. xii. 2012. San Ignacio RS: 1 ♀, 2 – 5. iii. 2015. San Nicolás RS: 1 ♂, 13 – 15. xii. 2013. General distribution. Brazil, Argentina, Uruguay (Moreira et al. 2011 b). Habitat. This species has been found in lagoons, streams, rivers and waterfalls (Ribeiro 2007; Armúa de Reyes & Kehr 2008; Ribeiro & Estévez 2009; Armúa de Reyes 2012; Almeida et al. 2019). At the INR, B. candidulum was collected from the margins with dense floating, emergent, and submerged vegetation in lentic habitats and in standing water of lotic habitats.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAA0D251ADBFF0B1537FD61.taxon	discussion	Remarks. This is the first record of B. candidulum from INR. This species was previously recorded from Corrientes Province by López Ruf et al. (2003), Armúa de Reyes & Kehr (2008), Armúa de Reyes (2012), and Chirino et al. (2017).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAA0D251ADBFD4D111FFAA4.taxon	materials_examined	Material examined. Itatí RS: 2 ♂, 28 – 31. iii. 2014. Laguna Iberá RS: 1 ♂, 1 ♀, Fernández Lagoon, 11. xii. 2014. San Ignacio RS: 1 ♀, Reserva Privada Don Luis, Monte Don Luis, roadside ditches, 27 ° 52.015 ’ S, 56 ° 54.914 ’ W, 5. iii. 2015. General distribution. Brazil, Peru, Bolivia, Paraguay, Argentina, Uruguay (Ribeiro et al. 2017). Habitat. Belostoma dentatum has been found in ditches, ponds, lagoons (in vegetated margins), lakes, pools in dry side-stream, and in quiet edges of streams and rivers (Nieser 1975; Melo & Nieser 2004; Ribeiro 2007; Armúa de Reyes & Kehr 2008; Ribeiro et al. 2017). This species has also been taken at lights (Nieser 1975; Almeida et al. 2019). At the INR, B. dentatum was collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, this species was collected at the margins of shaded ditches without aquatic vegetation, and from the margins of the Fernández Lagoon, exposed to sunlight and with emergent and floating vegetation.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAA0D251ADBFD4D111FFAA4.taxon	discussion	Remarks. This species was previously recorded from INR by Estévez & Armúa de Reyes (2003).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFAA0D251ADBFA0B102EF8B7.taxon	materials_examined	Material examined. Laguna Iberá RS: 2 ♂, Fernández Lagoon, 11. xii. 2014. San Ignacio RS: 2 ♂, 2 – 5. iii. 2015. General distribution. Brazil, Bolivia, Paraguay, Argentina, Uruguay (Moreira et al. 2011 b). Habitat. Belostoma dilatatum has been found in ditches, lakes, lagoons (in vegetated margins), and in quiet edges of streams and rivers (Ribeiro 2005, 2007; Armúa de Reyes & Kehr 2008; Armúa de Reyes 2012; Almeida et al. 2019). This species has also been taken at lights (Almeida et al. 2019). At the INR, specimens were collected from the vegetated margins of the Fernández Lagoon (Armúa de Reyes & Estévez 1999). During the present study, B. dilatatum was collected from the margins with dense floating, emergent and submerged vegetation in lentic habitats and in standing water of lotic habitats.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA50D2A1ADBFF0B166BFC9D.taxon	materials_examined	Material examined. Galarza RS: 1 ♀, Yacaré Stream, 16. iv. 2013; 1 ♀, Luna Lagoon, sample 2, 17. iv. 2013; 1 ♀, Luna Lagoon, sample 3, 17. iv. 2013; 1 ♂, Isirí Stream near Luna Lagoon, sample 6, 17. iv. 2013; 2 ♂, 4 ♀, Isirí Stream near Luna Lagoon, sample 7, 17. iv. 2013; 5 ♂, 5 ♀, Galarza Lagoon, sample 1, 18. iv. 2013; 2 ♂, 4 ♀, Isirí Stream near Luna Lagoon, 19. iv. 2013. Itatí RS: 1 ♂, 28 – 31. iii. 2014. Laguna Iberá RS: 2 ♂, 1 – 3. xii. 2012. San Nicolás RS: 2 ♀, 13 – 15. xii. 2013. General distribution. Brazil, Peru, Bolivia, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. Belostoma discretum has been found in lakes, reservoirs, and the vegetated margins of streams and rivers (in association with Pontederia crassipes and Paspalum repens) (Paporello de Amsler 1987; Ribeiro 2005, 2007; Poi de Neiff & Neiff 2006; Almeida et al. 2019). This species has also been taken at lights (Ribeiro 2007; Almeida et al. 2019). At the INR, B. discretum was collected from the margins with dense floating, emergent, and submerged vegetation in lentic habitats (Galarza Lagoon and Luna Lagoon), and in standing water of lotic habitats (Isirí Stream and Yacaré Stream).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA50D2A1ADBFF0B166BFC9D.taxon	discussion	Remarks. This is the first record of B. discretum from INR. This species was previously recorded from Corrientes Province by Montandon (1903 a), Torre-Bueno (1906), De Carlo (1930, 1938, 1959), Nieser (1975), Schnack (1976), Lanzer-de Souza (1980), Poi de Neiff (1981), Contartese & Bachmann (1987), López Ruf et al. (2003), Morrone et al. (2004), and Ribeiro (2007).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA50D2A1ADBFC5117E9F933.taxon	materials_examined	Material examined. Galarza RS: 1 ♂, Luna Lagoon, sample 1, 17. iv. 2013; 1 ♂, Luna Lagoon, sample 3, 17. iv. 2013. Itatí RS: 3 ♂, 28 – 31. iii. 2014. San Ignacio RS: 2 ♀, 2 – 5. iii. 2015. San Nicolás RS: 3 ♂, 2 ♀, 13 – 15. xii. 2013. Yahaveré RS: 1 ♂, Trin Lagoon, 12. xii. 2014. General distribution. Brazil, Peru, Bolivia, Chile, Paraguay, Argentina, Uruguay (Moreira et al. 2011 b). Habitat. Belostoma elegans has been found in ditches (densely vegetated), pools (densely vegetated), urban rain pools (without aquatic vegetation), natural and artificial ponds (densely vegetated), marshlands (densely vegetated), lagoons (in vegetated margins; sometimes in brackish water), and in quiet edges of artificial channels, streams and rivers (Berg 1881; Fernández & López Ruf 2006; Poi de Neiff & Neiff 2006; Torres et al. 2007; Armúa de Reyes & Kehr 2008; Fontanarrosa et al. 2009). At the INR, specimens were collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez & Armúa de Reyes 2003; Estévez et al. 2003; Armúa de Reyes & Estévez 2016). It was found in association with Pontederia azurea (Poi de Neiff 2003) and in the Laguna Iberá in association with Pistia stratiotes L., Salvinia sp., Egeria densa Planch. and Pontederia crassipes (Armúa et al. 2011). During the present study, B. elegans was collected from the margins with dense floating, emergent, and submerged vegetation (mainly P. crassipes and Salvinia biloba) in lentic habitats (Luna Lagoon and Trin Lagoon), and in standing water of lotic habitats. This species was also collected in association with P. crassipes in the Paraná River and Chaco Province (Argentina) (Poi de Neiff & Carignan 1997; Poi de Neiff & Neiff 2006).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA50D2B1ADBF8BF150BFDDC.taxon	materials_examined	Material examined. Itatí RS: 1 ♂, 28 – 31. iii. 2014. Laguna Iberá RS: 5 ♂, 5 ♀, Fernández Lagoon, 11. xii. 2014. San Ignacio RS: 1 ♂, Reserva Privada Don Luis, Monte Don Luis, roadside ditches, 27 ° 52.015 ’ S, 56 ° 54.914 ’ W, 5. iii. 2015. San Nicolás RS: 2 ♂, 13 – 15. xii. 2013. Yahaveré RS: 1 ♂, 1 ♀, Medina Lagoon, 13. xii. 2014; 2 ♂, Trin Lagoon, 12. xii. 2014. General distribution. Brazil, Peru, Bolivia, Paraguay, Argentina, Uruguay (Moreira et al. 2011 b). Habitat. Belostoma elongatum has been found in ditches, ponds (densely vegetated), marshes, lakes, lagoons (densely vegetated), and in quiet edges of streams and rivers (Armúa de Reyes & Estévez 1999; Armúa de Reyes et al. 2006; Poi de Neiff & Neiff 2006; Ribeiro 2007; Armúa de Reyes & Kehr 2008). This species has also been taken at lights (Almeida et al. 2019). At the INR, specimens were collected from the margins of the Iberá Lagoon (Estévez & Armúa de Reyes 2003; Estévez et al. 2003). During the present study, specimens were collected from the margins with dense floating, emergent, and submerged vegetation in unshaded lentic habitats (Fernández Lagoon, Medina Lagoon and Trin Lagoon), and in standing water of lotic habitats. It was also collected at the margins of a shaded roadside ditch without aquatic vegetation.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA40D2B1ADBFD121576FB21.taxon	materials_examined	Material examined. Galarza RS: 3 ♂, 1 ♀, Luna Lagoon, sample 1, 17. iv. 2013; 3 ♂, 1 ♀, Luna Lagoon, sample 3, 17. iv. 2013; 1 ♂, 4 ♀, Isirí Stream near Luna Lagoon, sample 7, 17. iv. 2013; 2 ♂, Galarza Lagoon, sample 1, 18. iv. 2013; 1 ♂, 1 ♀, flood-prone areas in Hermanos Fleita field, 18. iv. 2013. San Nicolás RS: 1 ♂, 13 – 15. xii. 2013. General distribution. Argentina (Coscarón 2017). Habitat. Nothing is known about the habitat associations of B. loprettoae, except that it was found in the Laguna Iberá in Corrientes Province, Argentina, in association with Pistia stratiotes, Salvinia sp., Egeria densa and Pontederia crassipes (Estévez & Armúa de Reyes 2003; Armúa et al. 2011). During the present study, this species was collected from the unshaded margins with dense floating, emergent, and submerged vegetation (mainly Pontederia crassipes, Salvinia biloba, Egeria densa and Nymphoides indica) in Galarza Lagoon and Luna Lagoon, and in flood-prone areas with unshaded margins with dense emergent vegetation. It was also collected in standing water along the moderately shaded margins of Isirí Stream, with dense floating, emergent, and submerged vegetation (mainly S. biloba).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA40D281ADBFA8D1111FE30.taxon	materials_examined	Material examined. Galarza RS: 1 ♂, 1 ♀, Yacaré Stream, 16. iv. 2013; 1 ♂, 1 ♀, Luna Lagoon, sample 3, 17. iv. 2013; 1 ♂, Isirí Stream near Luna Lagoon, sample 6, 17. iv. 2013; 10 ♂, 5 ♀, flood-prone areas in Hermanos Fleita field, 18. iv. 2013; 3 ♂, Isirí Stream near Luna Lagoon, 19. iv. 2013. Itatí RS: 1 ♂, 4 ♀, 28 – 31. iii. 2014. Laguna Iberá RS: 1 ♀, 1 – 3. xii. 2012; 2 ♂, Fernández Lagoon, 11. xii. 2014. San Ignacio RS: 4 ♂, 14 ♀, 2 – 5. iii. 2015. San Nicolás RS: 7 ♂, 3 ♀, 13 – 15. xii. 2013. Yahaveré RS: 2 ♂, 1 ♀, Medina Lagoon, 13. xii. 2014. General distribution. The Lesser Antilles, Colombia, Venezuela, Guyana, Suriname, Brazil, Bolivia, Paraguay, Argentina, Uruguay (Moreira et al. 2011 b). Habitat. Belostoma micantulum has been found in ditches (densely vegetated), waterholes in drying up forest stream, urban rain pools (without aquatic vegetation), natural pools, ponds (densely vegetated), marshlands (densely vegetated), lakes, lagoons (in vegetated margins), and in the quiet edges of artificial channels, streams and rivers (Nieser 1975; Armúa de Reyes & Estévez 1999; Estévez & Armúa de Reyes 2003; Torres et al. 2007; Fontanarrosa et al. 2009). It has also been taken at lights (Nieser 1975; Ribeiro 2007; Almeida et al. 2019). This species was collected from Iberá in association with Leersia hexandra, Ludwigia peploides, Salvinia biloba and Cabomba caroliniana (Poi de Neiff 1984, 1993, 2003) and in the Iberá Lagoon in association with Pistia stratiotes, Salvinia sp., Egeria densa and Pontederia crassipes (Estévez & Armúa de Reyes 2003; Estévez et al. 2003; Armúa et al. 2011). During the present study, B. micantulum was collected from the unshaded margins with dense floating, emergent and submerged vegetation (mainly Pontederia crassipes, S. biloba and Cyperus giganteus Vahl.) in Luna Lagoon, and in flood-prone areas with unshaded margins with dense emergent vegetation. It was also collected in standing water along the moderately shaded margins of Isirí Stream, with dense floating, emergent, and submerged vegetation (mainly S. biloba), and along the unshaded margins of Yacaré Stream, with dense floating, emergent and submerged vegetation (mainly Nymphoides indica, S. biloba and C. giganteus). This species was also collected in association with P. crassipes in the Paraná River and Chaco Province (Argentina) (Neiff & Poi de Neiff 1979; Poi de Neiff & Carignan 1997; Poi de Neiff & Neiff 2006), and with S. biloba in the Paraná River (Argentina) (Poi de Neiff & Neiff 2006).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA40D281ADBFA8D1111FE30.taxon	discussion	Remarks. Belostoma micantulum is one of the most widespread species of water bugs in the INR.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA70D281ADBFDBE1194FBE3.taxon	materials_examined	Material examined. San Ignacio RS: 1 ♂, 2 – 5. iii. 2015. San Nicolás RS: 1 ♂, 13 – 15. xii. 2013. Yahaveré RS: 1 ♀, Trin Lagoon, 12. xii. 2014. General distribution. Venezuela, Brazil, Peru, Bolivia, Paraguay, Argentina, Uruguay (Moreira et al. 2011 b). Habitat. Belostoma plebejum has been found in urban rain pools (without aquatic vegetation), ponds (densely vegetated), lakes, lagoons (in vegetated margins), bogs, reservoirs, and in quiet edges of streams and rivers (Ribeiro 2005; Estévez & Polhemus 2007; Armúa de Reyes & Kehr 2008; Fontanarrosa et al. 2009; Almeida et al. 2019). At the INR, B. plebejum was collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, this species was collected from the margins with dense floating, emergent, and submerged vegetation in lentic habitats and in standing water of lotic habitats.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA70D281ADBFBCF15A3FA30.taxon	description	Habitat. Belostoma testaceopallidum has been found in a shaded artificial reservoir, a small puddle, waterholes along a dry stream, the quiet edges of a stream (shallow and exposed to sunlight), and in a river with vegetated margins (Vianna & Melo 2003; Pelli et al. 2006; Ribeiro 2005, 2007). At the INR, B. testaceopallidum was collected from the margins of lentic habitats with dense floating, emergent, and submerged vegetation (Estévez & Armúa de Reyes 2003, as B. grandicollum De Carlo, 1934; Estévez et al. 2003, as B. grandicollum).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA70D291ADBF9BE167EFF1B.taxon	materials_examined	Habitat. Very little information exists regarding the habitat associations of this species. Almost all specimens of H. pelocoroides currently known have been captured while flying attracted to lights (Schnack & Estévez 2005; Rodrigues et al. 2020). Almeida et al. (2019) examined material from the Guaporé River (Rondônia State, Brazil). Although sampling methods were not mentioned in the text, we believe this material has also been taken at lights together with Belostoma aurivillianum (Montandon, 1899), collected with light trap in the same place (see p. 5, under “ Material examined ”). In wetland habitats, H. pelocoroides has been collected from marshes densely filled with floating hydrophytes dominated by Pontederia crassipes and Pistia stratiotes in a permanent shallow pond (Laguna Don Blanco) in Corrientes Province, Argentina (Schnack et al. 2006). At the INR, specimens were taken at lights in Colonia Carlos Pellegrini (Schnack & Estévez 2005), and collected in association with P. stratiotes, Salvinia sp., Egeria densa and P. crassipes in the Laguna Iberá (Armúa et al. 2011; Armúa de Reyes & Estévez 2016).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA60D291ADBFED61029FB8F.taxon	materials_examined	Material examined. Laguna Iberá RS: 6 ♂, Fernández Lagoon, 11. xii. 2014. San Ignacio RS: 1 ♀, light trap, 27 ° 49 ’ 26.52 ’’ S, 56 ° 50 ’ 52.26 ’’ W, 16. xi. 2018. General distribution. Mexico, Belize, Guatemala, Honduras, Nicaragua, Costa Rica, Panama, the Greater Antilles, the Lesser Antilles, Colombia, Venezuela, Guyana, Suriname, French Guiana, Brazil, Ecuador, Paraguay, Argentina, Uruguay (Nieser 1975; Moreira et al. 2011 b). Habitat. Lethocerus annulipes has been found in the margins of pools, marshes, ponds, lakes and lagoons exposed to sunlight and with floating, emergent or submerged vegetation (Nieser 1975; Armúa de Reyes & Estévez 1999, 2016; Melo & Nieser 2004; Perez Goodwyn 2006). This species has also been collected in standing or slow-moving water along the margins of streams and in rivers which are slow to moderately fast flowing, with or without aquatic vegetation and in shaded or unshaded areas (Roback & Nieser 1974; Armúa de Reyes & Estévez 1999, 2016; Melo & Nieser 2004; Perez Goodwyn 2006). It has also been taken at lights (Nieser 1975; Almeida et al. 2019). This species was collected together with L. maximus in the Paraná River (Argentina) in association with Salvinia sp. and Pontederia crassipes (Armúa de Reyes & Estévez 2016). At the INR, specimens were collected in the Fernández Lagoon and Iberá Lagoon (Armúa de Reyes & Estévez 1999, 2016). During the present study, this species was collected from the margins of the Fernández Lagoon, in shallow water with submerged, emergent and floating vegetation. One specimen was also taken at a light in San Ignacio Ranger Station.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA60D291ADBFED61029FB8F.taxon	discussion	Remarks. This species was also recorded from INR by Perez Goodwyn (2006).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA60D291ADBFB231690F92D.taxon	materials_examined	Material examined. Laguna Iberá RS: 3 ♂, Fernández Lagoon, 11. xii. 2014. General distribution. The Lesser Antilles, Colombia, Venezuela, Guyana, Suriname, French Guiana, Brazil, Ecuador, Peru, Bolivia, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. Lethocerus maximus has been found in rivers, a reservoir, and it has been taken at lights (Nieser & Alkins-Koo 1991; Perez Goodwyn 2006; Armúa de Reyes & Estévez 2016; Almeida et al. 2019). This species was collected together with L. annulipes in the Paraná River (Argentina), in association with Salvinia sp. and Pontederia crassipes (Armúa de Reyes & Estévez 2016). At the INR, specimens were collected from the margins of the Fernández Lagoon, exposed to sunlight and with submerged, emergent, and floating vegetation.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA60D291ADBFB231690F92D.taxon	discussion	Remarks. This is the first record of L. maximus from INR. This species was previously recorded from Corrientes Province (Armúa de Reyes & Estévez 2016).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA10D2E1ADBFEBB15E7FAE9.taxon	materials_examined	Material examined. Itatí RS: 1 ♀, Itatí Rincón Island, 28 ° 42.73 ’ S, 58 ° 6.69 ’ W, 29. iii. 2014; 1 ♂, 1 ♀, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 31. iii. 2014. Laguna Iberá RS: 2 ♂, 2 ♀, Iberá Lagoon, Fraga pier, 28 ° 31 ’ 50.00 ’’ S, 57 ° 11 ’ 13.68 ’’ W, 3. xii. 2012; 4 ♀, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 14. ii. 2018. San Ignacio RS: 2 ♂, 2 ♀, Camping Monterrey, Aguará pedestrian path, short walkway, marshes, 27 ° 52.152 ’ S, 56 ° 52.884 ’ W, 2. iii. 2015; 9 ♂, 14 ♀, vehicle path, roadside marshland and ditches, 27 ° 54.551 ’ S, 56 ° 53.254 ’ W, 3. iii. 2015; 1 ♂, vehicle path, roadside ditches, 27 ° 53.263 ’ S, 56 ° 53.125 ’ W, 3. iii. 2015; 14 ♂, 10 ♀, Camping Monterrey, ditches, 27 ° 52.610 ’ S, 56 ° 52.690 ’ W, 3. iii. 2015; 1 ♂, 1 ♀, Camping Monterrey, Aguará pedestrian path, artificial well, 27 ° 52.286 ’ S, 56 ° 52.767 ’ W, 4. iii. 2015; 3 ♂, 5 ♀, marshlands in front of the ranger’s house, 27 ° 49.413 ’ S, 56 ° 50.929 ’ W, 4. iii. 2015; 3 ♂, 5 ♀, road of “ Las 600 ” in front of Monte Grande, marshlands, 27 ° 50.991 ’ S, 56 ° 53.543 ’ W, 5. iii. 2015; 16 ♀, light trap, 5. iii. 2015; 11 ♀, light trap, 27 ° 49 ’ 26.52 ’’ S, 56 ° 50 ’ 52.26 ’’ W, 16. xi. 2018. San Nicolás RS: 1 ♀, marshland next to the barbecue area of the ranger station, 15. xii. 2013; 2 ♂, 44 ♀, marshland next to the house for the rangers, 15. xii. 2013; 10 ♀, light trap in the ranger station, 13 – 15. xii. 2013. Yahaveré RS: 2 ♂, 2 ♀, Concepción de Yaguareté Corá, route 22, roadside marshes, 28 ° 23 ’ 16.3 ” S, 57 ° 54 ’ 25.6 ” W, 5. xi. 2015. General distribution. Brazil, Ecuador, Argentina (Moreira et al. 2011 b). Habitat. Heterocorixa brasiliensis seems to prefer shallow lentic habitats with sandy bottom and with dense vegetation in Iberá (Bachmann 1981). This species was found in association with Leersia hexandra and Cabomba caroliniana (Poi de Neiff 1984, 1993, 2003). It has also been taken at lights (Bachmann 1981). During the present study, H. brasiliensis was collected from the margins with dense floating, emergent and submerged vegetation (mainly Azolla filiculoides, Pontederia azurea, P. crassipes, Hydrocleys nymphoides (Willd) Buchenau, Nymphoides indica and Salvinia biloba) in lentic habitats (Iberá Lagoon, artificial ponds, marshes, marshlands and ditches), in unshaded areas. Additional specimens of this species were taken at lights at San Ignacio Ranger Station, San Nicolás Ranger Station, and Laguna Iberá Ranger Station.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA10D2E1ADBFEBB15E7FAE9.taxon	discussion	Remarks. Heterocorixa brasiliensis was first recorded from INR by Bachmann (1979) and from the Galarza Lagoon by Poi de Neiff (1984).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA10D2F1ADBFAC51057FE15.taxon	materials_examined	Material examined. Itatí RS: 2 ♂, 1 ♀, Potrero Becasina, flood-prone areas in front of the ranger’s house, 28 ° 44.93 ’ S, 58 ° 7.53 ’ W, 30. iii. 2014; 1 ♂, 1 ♀, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 31. iii. 2014. Laguna Iberá RS: 1 ♂, 1 ♀, Iberá Lagoon, 28 ° 33 ’ 29.28 ’’ S, 57 ° 11 ’ 37.71 ’’ W, 1. xii. 2012; 3 ♂, 26 ♀, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 14. ii. 2018; 4 ♂, 22 ♀, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 15. ii. 2018; 4 ♂, 57 ♀, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 16. ii. 2018; 1 ♂, route 40, roadside pond, 17. ii. 2018; 3 ♂, 10 ♀, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 17. ii. 2018. San Ignacio RS: 1 ♂, Camping Monterrey, Aguará pedestrian path, artificial well, 27 ° 52.286 ’ S, 56 ° 52.767 ’ W, 4. iii. 2015; 1 ♂, 8 ♀, light trap, 27 ° 49 ’ 26.52 ’’ S, 56 ° 50 ’ 52.26 ’’ W, 16. xi. 2018; 1 ♂, Camping Monterrey, Aguará pedestrian path, marshland, 27 ° 52 ’ 14.10 ’’ S, 56 ° 52 ’ 59.70 ’’ W, 18. xi. 2018. San Nicolás RS: 4 ♂, 6 ♀, marshland next to the house for the rangers, 15. xii. 2013; 13 ♂, 9 ♀, light trap in the ranger station, 13 – 15. xii. 2013. Yahaveré RS: 1 ♂, 1 ♀, Concepción de Yaguareté Corá, route 22, roadside marshes, 28 ° 23 ’ 16.3 ” S, 57 ° 54 ’ 25.6 ” W, 5. xi. 2015; 3 ♂, 2 ♀, Campo Angelita, roadside marshes, 28 ° 25 ’ 16.3 S, 57 ° 49 ’ 40.8 ” W, 6. xi. 2015; 7 ♂, Campo Angelita, roadside marshes, 28 ° 25 ’ 40.9 ” S, 57 ° 49 ’ 12.3 ” W, 6. xi. 2015. General distribution. Brazil, Paraguay, Argentina, Uruguay (Moreira et al. 2011 b). Habitat. Sigara chrostowskii has been found in pools (including urban rain pools without aquatic vegetation), lagoons (with dense vegetation), streams and rivers (Hungerford 1948; Bachmann 1962 c; Fontanarrosa et al. 2004, 2013; Fernández & López Ruf 2006). It has also been taken at lights (Bachmann 1981). This species seems to prefer small lentic habitats with dense vegetation and organic debris, and slow-flowing streams (Bachmann 1981). Sigara chrostowskii was previously recorded from Iberá in association with Leersia hexandra and Cabomba caroliniana (Poi de Neiff 1993, 2003). During the present study, it was collected from margins with dense floating, emergent and submerged vegetation (mainly Azolla filiculoides, Pontederia azurea, P. crassipes, P. cordata, Hydrocleys nymphoides, Nymphoides indica and Salvinia biloba) in ponds (including artificial ones), marshlands, floodprone areas, and Iberá Lagoon. Additional specimens of this species were taken at lights in San Ignacio Ranger Station, San Nicolás Ranger Station and Laguna Iberá Ranger Station.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA10D2F1ADBFAC51057FE15.taxon	discussion	Remarks. Sigara chrostowskii was very often collected together with S. platensis.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA00D2F1ADBFDDA1059FB93.taxon	materials_examined	Material examined. San Ignacio RS: 1 ♂, light trap, 27 ° 49 ’ 26.52 ’’ S, 56 ° 50 ’ 52.26 ’’ W, 16. xi. 2018. Yahaveré RS: 4 ♂, 1 ♀, Trin Lagoon, 12. xii. 2014. General distribution. Brazil, Bolivia, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. Sigara denseconscripta has been found in lagoons, marshlands, streams and rivers (Poi de Neiff 1990; Corigliano et al. 1996; Fontanarrosa et al. 2004, 2013; Muzón et al. 2006). It has also been taken at lights (Bernardo et al. 2012). This species seems to prefer small and temporary lentic habitats, with scarce or no vegetation, and turbid waters warmed by the sun (Bachmann 1981). At the INR, specimens were collected from the margins of the Trin Lagoon, in shallow waters with submerged, emergent, and floating vegetation. One specimen of this species was taken at a light in San Ignacio Ranger Station.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA00D2F1ADBFDDA1059FB93.taxon	discussion	Remarks. This is the first record of S. denseconscripta from the INR. This species was previously recorded from Corrientes Province by Contartese & Bachmann (1986) and López Ruf et al. (2003).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA00D2C1ADBFB5F1678FCF5.taxon	materials_examined	Material examined. Galarza RS: 1 ♂, light trap, 16 – 18. iv. 2013. Itatí RS: 1 ♀, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 28. iii. 2014; 1 ♂, 3 ♀, Potrero Becasina, flood-prone areas in front of the ranger’s house, 28 ° 44.93 ’ S, 58 ° 7.53 ’ W, 30. iii. 2014; 1 ♀, Estancia El Dorado, pond, 28 ° 45.13 ’ S, 58 ° 7.40 ’ W, 30. iii. 2014; 2 ♂, 3 ♀, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 31. iii. 2014. Laguna Iberá RS: 1 ♂, 14 ♀, Fernández Lagoon, 11. xii. 2014; 1 ♀, Iberá Lagoon, 28 ° 34 ’ 3.94 ’’ S, 57 ° 11 ’ 22.15 ’’ W, 1. xii. 2012; 2 ♂, 3 ♀, San Antonio channel, 28 ° 35 ’ 26.69 ’’ S, 57 ° 10 ’ 27.81 ’’ W, 1. xii. 2012; 3 ♂, 2 ♀, Lobo Cuá Stream, 28 ° 32 ’ 44.64 ’’ S, 57 ° 12 ’ 15.21 ’’ W, 2. xii. 2012; 3 ♂, 7 ♀, Iberá Lagoon, Fraga pier, 28 ° 31 ’ 50.00 ’’ S, 57 ° 11 ’ 13.68 ’’ W, 3. xii. 2012; 3 ♂, 6 ♀, Colonia Carlos Pellegrini, light trap, 1. xii. 2012; 1 ♀, Iberá Lagoon, sample 1, 2. xii. 2012; 2 ♂, 50 ♀, Colonia Carlos Pellegrini, light trap, 2. xii. 2012; 1 ♂, Baletón San Pedro, 3. xii. 2012; 1 ♂, Colonia Carlos Pellegrini, light trap, 3. xii. 2012; 1 ♀, route 40, roadside pond and ditches, 28 ° 33 ’ 53.90 ’’ S, 57 ° 12 ’ 59.40 ’’ W, 15. ii. 2018; 1 ♂, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 16. ii. 2018; 1 ♂, 3 ♀, route 40, roadside pond, 17. ii. 2018; 2 ♀, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 17. ii. 2018. San Nicolás RS: 1 ♀, Carambola Stream, 28 ° 10.866 ’ S, 57 ° 26.224 ’ W, 14. xii. 2013. Yahaveré RS: 49 ♂, 143 ♀, Medina Lagoon, 11 – 13. xii. 2014; 1 ♀, Concepción de Yaguareté Corá, route 22, roadside marshes, 28 ° 23 ’ 16.3 ” S, 57 ° 54 ’ 25.6 ” W, 5. xi. 2015; 8 ♂, 6 ♀, Paso Cardozo, roadside marshes, 28 ° 23 ’ 47.0 ” S, 57 ° 52 ’ 36.2 ” W, 6. xi. 2015; 3 ♂, Campo Angelita, roadside marshes, 28 ° 25 ’ 16.3 S, 57 ° 49 ’ 40.8 ” W, 6. xi. 2015; 1 ♂, 1 ♀, Campo Angelita, roadside marshes, 28 ° 25 ’ 40.9 ” S, 57 ° 49 ’ 12.3 ” W, 6. xi. 2015; 1 ♀, Concepción de Yaguareté Corá, house for researchers, swimming pool, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 8. xi. 2015; 4 ♀, Concepción de Yaguareté Corá, house for researchers, light trap, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 6 – 7. xi. 2015. On the road to Itatí RS: 3 ♀, Mercedes Department, Pay Ubre Grande Stream, Provincial Route 29, 25 km NW Mercedes, 25. ix. 2003. General distribution. Brazil, Bolivia, Paraguay, Argentina, Uruguay (Moreira et al. 2011 b). Habitat. Sigara platensis has been found in pools (including temporary ones), lagoons, marshlands, streams and rivers (Bachmann 1962 c; Fontanarrosa et al. 2004; Melo & Nieser 2004; Fernández & López Ruf 2006; Torres et al. 2008). It has also been taken at lights (Bachmann 1981). This species seems to prefer temporary habitats with scarce or no vegetation, and with a great quantity of sedimented organic matter (Bachmann 1981). At the INR, S. platensis was collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003) and in Iberá in association with Leersia hexandra, Salvinia biloba, Egeria najas Planch. and Cabomba caroliniana (Poi de Neiff 1984, 1993, 2003). During the present study, it was collected from unshaded margins with dense floating, emergent and submerged vegetation (mainly Azolla filiculoides, Pontederia azurea, P. crassipes, P. cordata, Hydrocleys nymphoides, Nymphoides indica, Myriophyllum aquaticum, Sagittaria montevidensis Cham & Schltdl. and Salvinia biloba) in ponds (including artificial ones), lagoons (Fernández, Iberá and Medina lagoons), ditches, marshes, flood-prone areas, channels and streams (Carambola and Lobo Cuá streams). Sigara platensis was also collected in standing or slow-moving water along the margins without aquatic vegetation of Pay Ubre Grande Stream, in shaded places. Additional specimens of this species were taken at lights in Colonia Carlos Pellegrini, Concepción de Yaguareté Corá, Galarza Ranger Station and Laguna Iberá Ranger Station, and collected in a swimming pool in Concepción de Yaguareté Corá.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA00D2C1ADBFB5F1678FCF5.taxon	discussion	Remarks. Sigara platensis was often collected together with S. chrostowskii. It was first recorded from INR (Galarza Lagoon) by Poi de Neiff (1984).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA30D2C1ADBFB36112DF934.taxon	materials_examined	Material examined. Laguna Iberá RS: 2 ♀, Lobo Cuá Stream, 28 ° 32 ’ 37.14 ’’ S, 57 ° 12 ’ 3.89 ’’ W, 2. xii. 2012; 1 ♂, 1 ♀, Lobo Cuá Stream, 28 ° 32 ’ 52.66 ’’ S, 57 ° 12 ’ 38.56 ’’ W, 2. xii. 2012.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA30D2C1ADBFB36112DF934.taxon	distribution	General distribution. Brazil, Paraguay, Argentina, Uruguay (Moreira et al. 2011 b).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA30D2C1ADBFB36112DF934.taxon	biology_ecology	Habitat. Tenagobia fuscata has been found in the margins of ditches and lagoons exposed to sunlight and with floating, emergent, and submerged vegetation (Ronderos et al. 1969; Nieser 1977; Bachmann 1979, 1981; Bachmann & Farina 1989). This species has also been collected in artificial channels, streams and rivers that are slow to moderately fast-flowing (Bachmann 1962 c, 1979, 1981; Bachmann & Farina 1989; Fernández & López Ruf 2006). It seems to prefer permanent shaded habitats (including small ones) with dense emergent and submerged vegetation and organic debris (Bachmann 1981). This species has also been taken at lights (Dellapé & Carpintero 2012). At the INR, only a few specimens were collected from the vegetated margins of the Lobo Cuá Stream.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA30D2C1ADBFB36112DF934.taxon	discussion	Remarks. The collection of T. fuscata from INR represents the first record from Corrientes Province.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA30D2D1ADBF8BB17F4F890.taxon	materials_examined	Material examined. Galarza RS: 1 ♂, Yacaré Stream, 16. iv. 2013; 9 ♂, 9 ♀, Luna Lagoon, sample 1, 17. iv. 2013; 1 ♂, Luna Lagoon, sample 2, 17. iv. 2013; 1 ♀, Isirí Stream near Luna Lagoon, sample 6, 17. iv. 2013; 17 ♂, 20 ♀, Galarza Lagoon, Hermanos Fleita pier, 17. iv. 2013; 1 ♂, Galarza Lagoon, sample 3, 18. iv. 2013; 19 ♂, 21 ♀, flood-prone areas in Hermanos Fleita field, 18. iv. 2013; 1 ♀, light trap, 16 – 18. iv. 2013. Itatí RS: 4 ♂, 9 ♀, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 28. iii. 2014; 1 ♀, Corriente River, 28. iii. 2014; 1 ♂, 3 ♀, Itatí Rincón Island, 28 ° 42.73 ’ S, 58 ° 6.69 ’ W, 29. iii. 2014; 4 ♂, 2 ♀, Itatí marsh, 28 ° 42.78 ’ S 58 ° 7.19 ’ W, 29. iii. 2014; 1 ♂, 5 ♀, Potrero Becasina, flood-prone areas in front of the ranger’s house, 28 ° 44.93 ’ S, 58 ° 7.53 ’ W, 30. iii. 2014; 4 ♂, 4 ♀, Estancia El Dorado, pond, 28 ° 45.13 ’ S, 58 ° 7.40 ’ W, 30. iii. 2014; 16 ♂, 12 ♀, place of arrival for boats, 28 ° 44.28 ’ S, 58 ° 8.17 ’ W, 30. iii. 2014; 2 ♂, 5 ♀, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 31. iii. 2014. Laguna Iberá RS: 4 ♂, Iberá Lagoon, Fraga pier, 28 ° 31 ’ 50.00 ’’ S, 57 ° 11 ’ 13.68 ’’ W, 3. xii. 2012; 1 ♂, 6 ♀, Iberá Lagoon, Paso Claro, 28 ° 33 ’ 29 ’’ S, 57 ° 11 ’ 37 ’’ W, 16. ii. 2018; 9 ♂, 7 ♀, artificial channel, 16. ii. 2018. San Ignacio RS: 4 ♂, 1 ♀, Camping Monterrey, Aguará pedestrian path, long walkway, flood-prone areas, 27 ° 52.213 ’ S, 56 ° 52.977 ’ W, 2. iii. 2015; 5 ♂, 2 ♀, Camping Monterrey, Aguará pedestrian path, short walkway, marshes, 27 ° 52.152 ’ S, 56 ° 52.884 ’ W, 2. iii. 2015; 2 ♀, vehicle path, roadside marshland and ditches, 27 ° 54.444 ’ S, 56 ° 53.319 ’ W, 3. iii. 2015; 2 ♂, 3 ♀, vehicle path, roadside marshland and ditches, 27 ° 54.551 ’ S, 56 ° 53.254 ’ W, 3. iii. 2015; 1 ♂, vehicle path, roadside ditches, 27 ° 53.263 ’ S, 56 ° 53.125 ’ W, 3. iii. 2015; 2 ♀, Camping Monterrey, ditches, 27 ° 52.610 ’ S, 56 ° 52.690 ’ W, 3. iii. 2015; 11 ♂, 20 ♀, Camping Monterrey, Aguará pedestrian path, artificial well, 27 ° 52.286 ’ S, 56 ° 52.767 ’ W, 4. iii. 2015; 2 ♂, 2 ♀, Reserva Privada Don Luis, Monte Don Luis, roadside ditches, 27 ° 52.005 ’ S, 56 ° 55.073 ’ W, 4. iii. 2015; 3 ♂, 6 ♀, marshlands in front of the ranger’s house, 27 ° 49.413 ’ S, 56 ° 50.929 ’ W, 4. iii. 2015; 16 ♂, 20 ♀, temporary puddle, 27 ° 49.421 ’ S, 56 ° 50.877 ’ W, 4. iii. 2015; 37 ♂, 43 ♀, gate of “ Las 600 ”, roadside marshlands, 27 ° 50.888 ’ S, 56 ° 53.037 ’ W, 5. iii. 2015; 3 ♂, old pine tree forest of “ Las 600 ”, artificial channel, 27 ° 51.834 ’ S, 56 ° 54.285 ’ W, 5. iii. 2015; 1 ♀, light trap, 5. iii. 2015; 1 ♀, vehicle path, roadside marshland and ditches, 27 ° 49 ’ 26.64 ’’ S, 56 ° 50 ’ 52.38 ’’ W, 17. xi. 2018; 3 ♀, Camping Monterrey, Aguará pedestrian path, marshland, 27 ° 52 ’ 14.10 ’’ S, 56 ° 52 ’ 59.70 ’’ W, 18. xi. 2018; 1 ♂, 1 ♀, Camping Monterrey, Aguará pedestrian path, long walkway, marshes, 27 ° 52 ’ 14.58 ’’ S, 56 ° 52 ’ 59.76 ’’ W, 18. xi. 2018; 1 ♀, Camping Monterrey, Aguará pedestrian path, pond, 27 ° 52 ’ 17.46 ’’ S, 56 ° 52 ’ 45.18 ’’ W, 19. xi. 2018. San Nicolás RS: 1 ♀, Carambola Stream, 28 ° 11.878 ’ S, 57 ° 26.350 ’ W, 13. xii. 2013; 2 ♂, 4 ♀, Carambola Stream, 28 ° 10.866 ’ S, 57 ° 26.224 ’ W, 14. xii. 2013; 4 ♂, 3 ♀, Carambola Stream, 28 ° 10.108 ’ S, 57 ° 25.787 ’ W, 14. xii. 2013; 1 ♀, Carambola Stream, 28 ° 10.113 ’ S, 57 ° 25.788 ’ W, 14. xii. 2013; 1 ♂, 2 ♀, Carambola Stream, 28 ° 11.067 ’ S, 57 ° 26.567 ’ W, 14. xii. 2013; 10 ♂, 10 ♀, light trap in the ranger station, 13 – 15. xii. 2013. Yahaveré RS: 4 ♂, 1 ♀, Medina Lagoon, 11 – 13. xii. 2014; 1 ♂, 4 ♀, Concepción de Yaguareté Corá, route 22, roadside marshes, 28 ° 23 ’ 16.3 ” S, 57 ° 54 ’ 25.6 ” W, 5. xi. 2015; 7 ♂, 3 ♀, Campo Angelita, roadside marshes, 28 ° 25 ’ 40.9 ” S, 57 ° 49 ’ 12.3 ” W, 6. xi. 2015; 1 ♀, Concepción de Yaguareté Corá, house for researchers, light trap, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 6 – 7. xi. 2015. General distribution. Panama, the Lesser Antilles, Colombia, Venezuela, Suriname, Brazil, Peru, Bolivia, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. Tenagobia incerta has been found in the margins of ditches, pools, ponds, lakes, lagoons, marshes, channels, springs, streamlets, streams and rivers (Hungerford 1948; Nieser 1975, 1977; Poi de Neiff 1984, 1993). This species seems to prefer small and temporary habitats, with little or no vegetation, and the shallow parts of stagnant waters with little vegetation (Nieser 1975; Bachmann 1981; Melo & Nieser 2004). It has also been taken at lights (Hungerford 1948; Nieser 1975, 1977; Bachmann 1981). Tenagobia incerta was previously recorded from Iberá in association with Leersia hexandra, Egeria najas and Cabomba caroliniana (Poi de Neiff 1984, 1993, 2003). During the present study, it was collected from unshaded margins with dense floating, emergent and submerged vegetation (mainly Azolla filiculoides, Pontederia azurea, P. crassipes, P. cordata, Hydrocleys nymphoides, Nymphoides indica, Cyperus giganteus, Myriophyllum aquaticum, Leersia hexandra, Egeria densa, Sagittaria montevidensis, Salvinia biloba and Nymphaea prolifera Wiersema) in lentic habitats (ponds, including artificial ones; Luna Laggon; Galarza Lagoon; Iberá Lagoon; Medina Lagoon; ditches; marshes; marshlands; flood-prone areas), and lotic habitats (artificial channels, Yacaré Stream, Isirí Stream, Carambola Stream and Corriente River) in standing or slow-moving water. Additional specimens of this species were taken at lights in Concepción de Yaguareté Corá, San Ignacio Ranger Station, Galarza Ranger Station, and San Nicolás Ranger Station.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FFA30D2D1ADBF8BB17F4F890.taxon	discussion	Remarks. Tenagobia incerta is one of the most widespread species of water bugs in the INR. This species was often collected together with T. schadei, and only once with T. selecta tarahui.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9D0D121ADBFF0B10C3F8E1.taxon	materials_examined	Material examined. Galarza RS: 1 ♀, Galarza Lagoon, Hermanos Fleita pier, 17. iv. 2013; 1 ♂, 4 ♀, flood-prone areas in Hermanos Fleita field, 18. iv. 2013. Itatí RS: 3 ♀, Corriente River, 26. ix. 2003; 3 ♀, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 28. iii. 2014. Laguna Iberá RS: 2 ♂, Iberá Lagoon, Fraga pier, 28 ° 31 ’ 50.00 ’’ S, 57 ° 11 ’ 13.68 ’’ W, 3. xii. 2012; 1 ♂, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 14. ii. 2018; 4 ♂, 2 ♀, Miriñay channel, 28 ° 34 ’ 13 ’’ S, 57 ° 10 ’ 13 ’’ W, 16. ii. 2018; 1 ♀, route 40, roadside pond, 17. ii. 2018. San Ignacio RS: 4 ♂, 2 ♀, Camping Monterrey, Aguará pedestrian path, short walkway, marshes, 27 ° 52.152 ’ S, 56 ° 52.884 ’ W, 2. iii. 2015; 2 ♂, vehicle path, roadside marshland and ditches, 27 ° 54.551 ’ S, 56 ° 53.254 ’ W, 3. iii. 2015; 15 ♂, 14 ♀, Camping Monterrey, ditches, 27 ° 52.610 ’ S, 56 ° 52.690 ’ W, 3. iii. 2015; 1 ♀, Camping Monterrey, Aguará pedestrian path, artificial well, 27 ° 52.286 ’ S, 56 ° 52.767 ’ W, 4. iii. 2015; 4 ♂, road of “ Las 600 ” in front of Monte Grande, marshlands, 27 ° 50.991 ’ S, 56 ° 53.543 ’ W, 5. iii. 2015; 1 ♀, old pine tree forest of “ Las 600 ”, artificial channel, 27 ° 51.834 ’ S, 56 ° 54.285 ’ W, 5. iii. 2015; 6 ♂, 31 ♀, light trap, 27 ° 49 ’ 26.52 ’’ S, 56 ° 50 ’ 52.26 ’’ W, 16. xi. 2018; 1 ♀, vehicle path, roadside marshland and ditches, 27 ° 49 ’ 26.64 ’’ S, 56 ° 50 ’ 52.38 ’’ W, 17. xi. 2018; 1 ♀, vehicle path, roadside ditches, 27 ° 54 ’ 10.14 ’’ S, 56 ° 53 ’ 14.10 ’’ W, 17. xi. 2018; 1 ♀, vehicle path, roadside ditches, 27 ° 54 ’ 0.24 ’’ S, 56 ° 53 ’ 6.42 ’’ W, 17. xi. 2018; 3 ♂, 2 ♀, Camping Monterrey, Aguará pedestrian path, marshland, 27 ° 52 ’ 14.10 ’’ S, 56 ° 52 ’ 59.70 ’’ W, 18. xi. 2018; 3 ♂, 4 ♀, Camping Monterrey, Aguará pedestrian path, long walkway, marshes, 27 ° 52 ’ 14.58 ’’ S, 56 ° 52 ’ 59.76 ’’ W, 18. xi. 2018. San Nicolás RS: 8 ♂, 9 ♀, marshland next to the house for the rangers, 15. xii. 2013; 10 ♂, 10 ♀, light trap in the ranger station, 13 – 15. xii. 2013. Yahaveré RS: 3 ♀, Concepción de Yaguareté Corá, route 22, roadside marshes, 28 ° 23 ’ 16.3 ” S, 57 ° 54 ’ 25.6 ” W, 5. xi. 2015; 1 ♂, Campo Angelita, roadside marshes, 28 ° 25 ’ 40.9 ” S, 57 ° 49 ’ 12.3 ” W, 6. xi. 2015; 1 ♂, Caaby Aguilar, marshes, 28 ° 24 ’ 03.4 ” S, 57 ° 51 ’ 31.3 ” W, 8. xi. 2015; 1 ♂, Concepción de Yaguareté Corá, house for researchers, light trap, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 6 – 7. xi. 2015. On the road to Itatí RS: 2 ♂, Mercedes Department, Pay Ubre Grande Stream, Provincial Route 29, 25 km NW Mercedes, 25. ix. 2003. General distribution. Colombia, Suriname, Brazil, Ecuador, Bolivia, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. Tenagobia schadei has been found in the margins of ditches (with aquatic vegetation), pools (with or without aquatic vegetation; including rocky pools by the waterfall), ponds (with or without aquatic vegetation), lakes, lagoons (with aquatic vegetation), marshes (with aquatic vegetation), channels, streamlets (without aquatic vegetation), streams (with very slowly running water) and rivers (Nieser 1975, 1977; Poi de Neiff 1984; Melo & Nieser 2004; Pelli et al. 2006). This species seems to prefer lentic habitats or habitats with slowly running water, with scarce to moderately dense aquatic vegetation (Bachmann 1981). It has also been taken at lights (Nieser 1975, 1977). Tenagobia schadei was previously recorded from Iberá in association with Leersia hexandra, Egeria najas, Salvinia biloba, Pontederia azurea and Cabomba caroliniana (Poi de Neiff 1984, 1993, 2003). During the present study, it was collected from unshaded margins with dense floating, emergent and submerged vegetation (mainly Azolla filiculoides, Pontederia azurea, P. crassipes, P. cordata, Hydrocleys nymphoides, Nymphoides indica, Egeria densa and Salvinia biloba) in lentic habitats (ponds, Galarza Lagoon, Iberá Lagoon, ditches, marshes, marshlands and flood-prone areas) and lotic habitats (Miriñay channel, artificial channels and Corriente River) in standing or slowmoving water. This species was also collected in standing or slow-moving water along the margins without aquatic vegetation of Pay Ubre Grande Stream, in shaded places. Additional specimens of this species were taken at lights in Concepción de Yaguareté Corá, San Ignacio Ranger Station, Laguna Iberá Ranger Station and San Nicolás Ranger Station.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9D0D121ADBFF0B10C3F8E1.taxon	discussion	Remarks. Tenagobia schadei is one of the most widespread species of water bugs in the INR. This species was very often collected together with T. incerta. It was recorded from INR by Bachmann (1979, 1981).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9D0D131ADBF8CD178BFE15.taxon	materials_examined	Material examined. Galarza RS: 4 ♂, 1 ♀, Isirí Stream near Luna Lagoon, sample 6, 17. iv. 2013. General distribution. Paraguay (?), Argentina (Bachmann 1979). Habitat. Little information exists regarding the habitat associations of Tenagobia selecta tarahui. Bachmann (1979) described this subspecies from Corrientes Province (Argentina), based on specimens collected in La Totora Lagoon in association with submerged vegetation (mainly Egeria sp.). It has been found in association with Egeria najas (Poi de Neiff 1979) and Pontederia crassipes (Poi de Neiff & Carignan 1997; Poi de Neiff & Neiff 2006). Tenagobia selecta tarahui was previously recorded from Iberá in association with Egeria najas (Poi de Neiff 2003). It was collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, only a few specimens were collected from the vegetated margins of the Isirí Stream.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9D0D131ADBF8CD178BFE15.taxon	discussion	Remarks. This subspecies was collected together with T. incerta.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9C0D131ADBFC161555FAE6.taxon	description	Habitat. Knowledge regarding this species is based on only a few specimens (Estévez & Schnack 1981; Estévez et al. 2003, 2010). Nothing is known about its habitat associations, except that it was found in the INR, moving or resting among the flooded grass, aquatic rooted plants, or on the bottom in the Laguna Iberá (Estévez et al. 2010). They were also observed submerged, walking or resting among the aquatic plants or on the bottom, and swimming on the water surface with their fore legs folded and propelled by their middle and hind legs (Estévez et al. 2003, 2010).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9C0D131ADBFAC51162F883.taxon	description	Habitat. Nerthra ranina has been found in streams, rivers, lagoons and the wet margins of stagnant pools connected to streams (Bachmann 1962 c; Estévez & Schnack 1979; Schnack & Estévez 1979; Melo & Nieser 2004; Estévez & López Ruf 2006). Specimens were also collected with pitfall traps in grasslands surrounded by a permanent channel in the Delta of the Paraná River in Argentina (Nanni et al. 2011). At the INR, this species was found moving or resting among the flooded grass, aquatic rooted plants, or on the bottom in the Laguna Iberá (Estévez & López Ruf 2006; Estévez et al. 2010). It was also observed submerged, walking or resting among the aquatic plants or on the bottom, and swimming on the water surface with their fore legs folded and propelled by their second and hind legs (Estévez et al. 2003, 2010; Estévez & López Ruf 2006).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9F0D101ADBFDBF1608FC09.taxon	materials_examined	Material examined. Laguna Iberá RS: 1 ♀, Lobo Cuá Stream, 28 ° 32 ’ 37.14 ’’ S, 57 ° 12 ’ 3.89 ’’ W, 2. xii. 2012. General distribution. Brazil, Argentina (Moreira et al. 2011 b). Habitat. Very little information exists regarding the habitat associations of A. attenuatus other than its occurrence in streams (López Ruf 2007; López Ruf & Hernández 2007). At the INR, this species was collected from a single locality, at the margins with dense floating, emergent, and submerged vegetation of Lobo Cuá Stream.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9F0D101ADBFDBF1608FC09.taxon	discussion	Remarks. The collection of A. attenuatus from INR represents the first record from Corrientes Province. Reynoso-Velasco & Sites (2021) considered it likely that this species, originally described in Ambrysus, is a member of the genus Australambrysus.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9F0D101ADBFBA61040F8F8.taxon	materials_examined	Material examined. Galarza RS: 2 ♀, Galarza Lagoon, Vizcaychipi channel, 16. iv. 2013; 1 ♂, Luna Lagoon, sample 5, 17. iv. 2013; 2 ♀, Galarza Lagoon, sample 3, 18. iv. 2013; 1 ♂, 1 ♀, Isirí Stream near Luna Lagoon, 19. iv. 2013. Laguna Iberá RS: 1 ♀, route 40, roadside pond and ditches, 28 ° 33 ’ 53.90 ’’ S, 57 ° 12 ’ 59.40 ’’ W, 15. ii. 2018. Yahaveré RS: 1 ♂, 1 ♀, Campo Angelita, roadside marshes, 28 ° 25 ’ 16.3 ’’ S, 57 ° 49 ’ 40.8 ” W, 6. xi. 2015; 1 ♀, Medina Lagoon, 28 ° 34 ’ 35.1 ” S, 57 ° 45 ’ 36.2 ” W, 7. xi. 2015. General distribution. Brazil, Paraguay, Argentina (Herrera 2013). Habitat. Little information exists regarding the habitat associations of C. schadei. It has been collected in densely vegetated lagoons, marshlands and rivers (López Ruf 1988, 2004; Estévez et al. 2003; Torres et al. 2007). At the INR, specimens were collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003) and in Iberá in association with Cabomba caroliniana, Salvinia sp., Pontederia crassipes, Nymphaea sp. and Lemnaceae (Poi de Neiff 1993; López Ruf 2004). During the present study, it was collected from unshaded margins with dense floating, emergent and submerged vegetation (mainly Pontederia crassipes, Myriophyllum aquaticum, Nymphoides indica and Salvinia biloba) in lentic habitats (ponds, Luna Lagoon, Galarza Lagoon, Medina Lagoon and ditches), and lotic habitats (Vizcaychipi channel and Isirí Stream) in standing or slow-moving water.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9F0D101ADBFBA61040F8F8.taxon	discussion	Remarks. This species was recorded from the Iberá Lagoon by López Ruf (2004).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9F0D111ADBF8F71518FD2D.taxon	description	Habitat. Pelocoris binotulatus nigriculus has been found in ponds, lagoons (with aquatic vegetation), marshlands (densely vegetated), streams and rivers (Bachmann 1962 c; Fontanarrosa et al. 2004; López Ruf 2004; Melo & Nieser 2004; Torres et al. 2007). At the INR, specimens were collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003) and in Iberá in association with Salvinia biloba, Salvinia sp., Pontederia crassipes, Nymphaea sp., and Lemnaceae (Poi de Neiff 2003; López Ruf 2004). During the present study, it was collected from unshaded margins with dense floating, emergent and submerged vegetation (mainly P. crassipes and S. biloba) in lentic habitats (Iberá Lagoon, Fernández Lagoon and marshlands), and lotic habitats (Lobo Cuá Stream) in standing or slow-moving water.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9F0D111ADBF8F71518FD2D.taxon	discussion	Remarks. The only published record from Colombia (Morales-Castaño & Molano-Rendón 2008) needs confirmation.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9E0D111ADBFC8210BEF884.taxon	materials_examined	Material examined. Itatí RS: 1 ♀, Itatí Rincón Island, 28 ° 42.73 ’ S, 58 ° 6.69 ’ W, 29. iii. 2014; 2 ♂, 1 ♀, Itatí marsh, 28 ° 42.78 ’ S, 58 ° 7.19 ’ W, 29. iii. 2014; 1 ♂, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 31. iii. 2014. Laguna Iberá RS: 1 ♀, Lobo Cuá Stream, 28 ° 32 ’ 52.66 ’’ S, 57 ° 12 ’ 38.56 ’’ W, 2. xii. 2012; 1 ♂, Iberá Lagoon, Fraga pier, 28 ° 31 ’ 50.00 ’’ S, 57 ° 11 ’ 13.68 ’’ W, 3. xii. 2012; 2 ♂, Iberá Lagoon, 28 ° 31 ’ 39,74 ’’ S, 57 ° 10 ’ 52,61 ’’ W, 3. xii. 2012. San Ignacio RS: 1 ♂, 1 ♀, vehicle path, roadside marshland and ditches, 27 ° 54.551 ’ S, 56 ° 53.254 ’ W, 3. iii. 2015; 2 ♂, 1 ♀, gate of “ Las 600 ”, roadside marshlands, 27 ° 50.888 ’ S, 56 ° 53.037 ’ W, 5. iii. 2015; 1 ♀, road of “ Las 600 ” in front of Monte Grande, marshlands, 27 ° 50.991 ’ S, 56 ° 53.543 ’ W, 5. iii. 2015; 2 ♂, 3 ♀, vehicle path, roadside ditches, 27 ° 54 ’ 10.14 ’’ S, 56 ° 53 ’ 14.10 ’’ W, 17. xi. 2018; 1 ♀, Camping Monterrey, Aguará pedestrian path, marshland, 27 ° 52 ’ 14.10 ’’ S, 56 ° 52 ’ 59.70 ’’ W, 18. xi. 2018; 1 ♀, Camping Monterrey, Aguará pedestrian path, pond, 27 ° 52 ’ 17.46 ’’ S, 56 ° 52 ’ 45.18 ’’ W, 19. xi. 2018. San Nicolás RS: 1 ♀, Carambola Stream, 28 ° 12.165 ’ S, 57 ° 26.389 ’ W, 13. xii. 2013; 1 ♂, Carambola Stream, 28 ° 11.878 ’ S, 57 ° 26.350 ’ W, 13. xii. 2013; 1 ♀, Carambola Stream, 28 ° 11.605 ’ S, 57 ° 26.329 ’ W, 13. xii. 2013; 1 ♂, 5 ♀, Carambola Stream, 28 ° 10.866 ’ S, 57 ° 26.224 ’ W, 14. xii. 2013; 1 ♀, Paraná Lagoon, 28 ° 15.735 ’ S, 57 ° 26.169 ’ W, 14. xii. 2013; 1 ♂, Carambola Stream, 28 ° 14.610 ’ S, 57 ° 26.378 ’ W, 14. xii. 2013. Yahaveré RS: 1 ♂, 1 ♀, Medina Lagoon, 28 ° 34 ’ 35.1 ” S, 57 ° 45 ’ 36.2 ” W, 7. xi. 2015. General distribution. Colombia, Suriname, French Guiana, Brazil, Bolivia, Paraguay, Argentina (Nieser 1975; López Ruf & Nieser 1999; Moreira et al. 2011 b). Habitat. Pelocoris bipunctulus has been found in ponds (densely or scarcely vegetated), small lakes (densely vegetated), streams and rivers (Roback & Nieser 1974; López Ruf 1989, 1992; Melo & Nieser 2004; Torres et al. 2007). Pelocoris bipunctulus was previously recorded from Iberá in association with Leersia hexandra, Egeria najas, Pontederia azurea and Cabomba caroliniana (Poi de Neiff 1993, 2003). During the present study, it was collected from unshaded margins with dense floating, emergent and submerged vegetation (mainly Azolla filiculoides, Pontederia azurea, P. crassipes, Myriophyllum aquaticum, Nymphoides indica, Cabomba caroliniana, Nymphaea prolifera and Salvinia biloba) in lentic habitats (Paraná Lagoon, Iberá Lagoon, Medina Lagoon, marshes, marshlands and ditches), and lotic habitats (Carambola Stream and Lobo Cuá Stream) in standing or slow-moving water.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9E0D111ADBFC8210BEF884.taxon	discussion	Remarks. Pelocoris bipunctulus was collected together with P. politus and P. procurrens.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF990D161ADBFF0B1140FBEC.taxon	materials_examined	Material examined. Galarza RS: 1 ♀, Isirí Stream near Luna Lagoon, sample 7, 17. iv. 2013; 3 ♂, Isirí Stream near Luna Lagoon, 19. iv. 2013. Itatí RS: 1 ♂, 1 ♀, Itatí Lagoon, 28 ° 41.92 ’ S, 58 ° 6.49 ’ W, 28. iii. 2014; 4 ♂, 2 ♀, Itatí Rincón Island, 28 ° 42.73 ’ S, 58 ° 6.69 ’ W, 29. iii. 2014; 3 ♂, Corriente River, 28 ° 44.18 ’ S, 58 ° 8.70 ’ W, 30. iii. 2014. Laguna Iberá RS: 1 ♂, Iberá Lagoon, 28 ° 34 ’ 3.94 ’’ S, 57 ° 11 ’ 22.15 ’’ W, 1. xii. 2012; 2 ♂, 1 ♀, Corriente Stream, 28 ° 32 ’ 11.91 ’’ S, 57 ° 12 ’ 42.96 ’’ W, 2. xii. 2012; 2 ♂, 3 ♀, Fernández Lagoon, 11. xii. 2014. San Ignacio RS: 1 ♀, vehicle path, roadside marshland and ditches, 27 ° 54.551 ’ S, 56 ° 53.254 ’ W, 3. iii. 2015. San Nicolás RS: 1 ♀, Carambola Stream, 28 ° 10.866 ’ S, 57 ° 26.224 ’ W, 14. xii. 2013; 1 ♂, Carambola Stream, 28 ° 14.610 ’ S, 57 ° 26.378 ’ W, 14. xii. 2013. Yahaveré RS: 3 ♂, 6 ♀, Campo Angelita, roadside marshes, 28 ° 25 ’ 40.9 ” S, 57 ° 49 ’ 12.3 ” W, 6. xi. 2015; 1 ♀, Paso Batalla, roadside marshes, 28 ° 24 ’ 02.5 ” S, 57 ° 52 ’ 56.5 W, 6. xi. 2015; 3 ♂, 1 ♀, Medina Lagoon, 28 ° 33 ’ 52.6 ” S, 57 ° 45 ’ 28.7 ” W, 7. xi. 2015; 1 ♀, Caaby Aguilar, roadside marshes, 28 ° 24 ’ 03.4 ” S, 57 ° 51 ’ 31.3 ” W, 8. xi. 2015. General distribution. Colombia, Brazil, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. Pelocoris politus has been found in rivers and lagoons (Roback & Nieser 1974; Nieser 1975; López Ruf 1988, 1992, 1994 b). At the INR, P. politus was collected from unshaded margins with dense floating, emergent and submerged vegetation (mainly Azolla filiculoides, Pontederia azurea, P. cordata, Myriophyllum aquaticum, Hydrocleys nymphoides and Salvinia biloba) in lentic habitats (Iberá Lagoon, Fernández Lagoon, Medina Lagoon, Itatí Lagoon, marshes, marshlands and ditches), and lotic habitats (Corriente Stream, Isirí Stream, Carambola Stream and Corriente River) in standing or slow-moving water.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF990D161ADBFF0B1140FBEC.taxon	discussion	Remarks. Pelocoris politus is one of the most widespread species of water bugs in the INR. It was collected together with P. bipunctulus and P. procurrens. This is the first record of this species from INR. Pelocoris politus was previously recorded from Corrientes Province by López Ruf (1988, 1992, 1994 b) and López Ruf et al. (2006).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF990D171ADBFBC11603FD67.taxon	materials_examined	Material examined. Galarza RS: 1 ♂, Yacaré Stream, 16. iv. 2013; 1 ♂, 2 ♀, Galarza Lagoon, Vizcaychipi channel, 16. iv. 2013; 1 ♂, Luna Lagoon, sample 4, 17. iv. 2013; 1 ♂, 1 ♀, Galarza Lagoon, sample 1, 18. iv. 2013; 1 ♂, Galarza Lagoon, sample 3, 18. iv. 2013; 1 ♂, 3 ♀, Isirí Stream near Luna Lagoon, 19. iv. 2013. Itatí RS: 1 ♂, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 28. iii. 2014; 1 ♀, Itatí Rincón Island, 28 ° 42.73 ’ S, 58 ° 6.69 ’ W, 29. iii. 2014; 1 ♂, Potrero Becasina, flood-prone areas in front of the ranger’s house, 28 ° 44.93 ’ S, 58 ° 7.53 ’ W, 30. iii. 2014; 2 ♂, 2 ♀, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 31. iii. 2014. Laguna Iberá RS: 2 ♀, Iberá Lagoon, 28 ° 34 ’ 3.94 ’’ S, 57 ° 11 ’ 22.15 ’’ W, 1. xii. 2012; 2 ♀, Lobo Cuá Stream, 28 ° 32 ’ 37.14 ’’ S, 57 ° 12 ’ 3.89 ’’ W, 2. xii. 2012; 2 ♀, Corriente Stream, 28 ° 32 ’ 11.91 ’’ S, 57 ° 12 ’ 42.96 ’’ W, 2. xii. 2012; 3 ♂, 1 ♀, Baletón San Pedro, 3. xii. 2012; 7 ♂, 7 ♀, route 40, roadside pond and ditches, 28 ° 33 ’ 53.90 ’’ S, 57 ° 12 ’ 59.40 ’’ W, 15. ii. 2018; 1 ♂, 1 ♀, route 40, roadside pond, 17. ii. 2018. San Ignacio RS: 1 ♂, 1 ♀, Camping Monterrey, Aguará pedestrian path, artificial well, 27 ° 52.286 ’ S, 56 ° 52.767 ’ W, 4. iii. 2015; 1 ♀, road of “ Las 600 ” in front of Monte Grande, marshlands, 27 ° 50.991 ’ S, 56 ° 53.543 ’ W, 5. iii. 2015; 1 ♂, Reserva Privada Don Luis, Monte Don Luis, roadside pond, 27 ° 52 ’ 0.60 ’’ S, 56 ° 54 ’ 54.18 ’’ W, 16. xi. 2018; 3 ♂, 2 ♀, vehicle path, roadside ditches, 27 ° 54 ’ 10.14 ’’ S, 56 ° 53 ’ 14.10 ’’ W, 17. xi. 2018; 1 ♂, vehicle path, roadside ditches, 27 ° 54 ’ 0.24 ’’ S, 56 ° 53 ’ 6.42 ’’ W, 17. xi. 2018; 1 ♂, Camping Monterrey, Aguará pedestrian path, long walkway, marshes, 27 ° 52 ’ 14.58 ’’ S, 56 ° 52 ’ 59.76 ’’ W, 18. xi. 2018; 1 ♂, 2 ♀, Camping Monterrey, Aguará pedestrian path, pond and flood-prone areas, 27 ° 52 ’ 26.76 ’’ S, 56 ° 52 ’ 48.78 ’’ W, 19. xi. 2018. San Nicolás RS: 2 ♂, 1 ♀, Carambola Stream, 28 ° 11.231 ’ S, 57 ° 26.484 ’ W, 13. xii. 2013; 1 ♀, Carambola Stream, 28 ° 10.108 ’ S, 57 ° 25.787 ’ W, 14. xii. 2013; 1 ♀, Carambola Stream, 28 ° 11.067 ’ S, 57 ° 26.567 ’ W, 14. xii. 2013; 1 ♀, marshland next to the barbecue area of the ranger station, 15. xii. 2013; 3 ♂, 1 ♀, marshland next to the house for the rangers, 15. xii. 2013. Yahaveré RS: 2 ♂, Concepción de Yaguareté Corá, route 22, roadside marshes, 28 ° 23 ’ 16.3 ” S, 57 ° 54 ’ 25.6 ” W, 5. xi. 2015; 3 ♀, Campo Angelita, roadside marshes, 28 ° 25 ’ 40.9 ” S, 57 ° 49 ’ 12.3 ” W, 6. xi. 2015; 1 ♂, Carambola Stream, 28 ° 29 ’ 48.8 ” S, 57 ° 41 ’ 09.6 ” W, 7. xi. 2015; 1 ♂, 3 ♀, Caaby Aguilar, roadside marshes, 28 ° 24 ’ 03.4 ” S, 57 ° 51 ’ 31.3 ” W, 8. xi. 2015. On the road to Itatí RS, Mercedes Department: 1 ♀, Pay Ubre Chico Stream, Provincial Route 29, 28. iii. 2014. General distribution. Brazil, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. Pelocoris procurrens has been found in rivers, streams and ponds (Montandon 1895; Nieser 1975; López Ruf 1989, 1994 b). During the present study, P. procurrens was collected from unshaded margins with dense floating, emergent and submerged vegetation (mainly Azolla filiculoides, Pontederia azurea, P. crassipes, P. cordata, Myriophyllum aquaticum, Nymphoides indica, Egeria densa, Sagittaria montevidensis, Cyperus giganteus, Hydrocleys nymphoides and Salvinia biloba) in lentic habitats (Luna Lagoon, Galarza Lagoon, Iberá Lagoon, marshes, marshlands, ditches, ponds and flood-prone areas), and lotic habitats (Yacaré Stream, Corriente Stream, Isirí Stream, Carambola Stream, Lobo Cuá Stream, Pay Ubre Chico Stream and channels) in standing or slow-moving water.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF990D171ADBFBC11603FD67.taxon	discussion	Remarks. Pelocoris procurrens is one of the most widespread species of water bugs in the INR. This species was collected together with P. bipunctulus and P. politus. This is the first record of this species from INR. Pelocoris procurrens was previously recorded from Corrientes Province by López Ruf (1988, 1989, 1994 b), Bachmann (1998), and López Ruf et al. (2003, 2006).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF980D171ADBFBFF112EF8FF.taxon	materials_examined	Material examined. Galarza RS: 2 ♂, 4 ♀, flood-prone areas in Hermanos Fleita field, 18. iv. 2013. Laguna Iberá RS: 1 ♀, Lobo Cuá Stream, 28 ° 32 ’ 44.64 ’’ S, 57 ° 12 ’ 15.21 ’’ W, 2. xii. 2012; 1 ♀, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 14. ii. 2018; 1 ♂, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 16. ii. 2018; 1 ♂, 1 ♀, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 17. ii. 2018. San Ignacio RS: 3 ♂, 6 ♀, light trap in the ranger station, 27 ° 49 ’ 26.52 ’’ S, 56 ° 50 ’ 52.26 ’’ W, 16. xi. 2018. General distribution. The Lesser Antilles, Guyana, Suriname, Brazil, Peru, Bolivia, Paraguay, Argentina (Barbosa & Nessimian 2013). Habitat. Buenoa amnigenus has been found in the margins of ditches, drains, mangrove swamps, pools, ponds, and natural and artificial lakes, mostly exposed to sunlight and with floating, emergent, submerged vegetation and rivers (Truxal 1953; Nieser 1975; Nieser & Alkins-Koo 1991; Barbosa & Nessimian 2013). It has also been taken at lights (Nieser 1975; Barbosa & Nessimian 2013). At the INR, specimens were collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, this species was collected in flood-prone areas (together with B. salutis) and streams with unshaded margins and with dense emergent vegetation. Additional specimens of this species were taken at lights in San Ignacio Ranger Station and Laguna Iberá Ranger Station.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF980D141ADBF8EC178CFD64.taxon	description	Habitat. Buenoa a. antigone has been found at the margins of ponds, lakes, lagoons (exposed to sunlight and with dense floating vegetation), as well as in creeks and slow-moving sections of streams (partly exposed to sunshine, without aquatic vegetation) (Truxal 1953; Nieser 1970 a; Torres et al. 2008; Muñoz Riviaux et al. 2010; Lanigan & Hyslop 2011). At the INR, only one specimen was collected from the margins of a pond exposed to sunlight and with emergent vegetation, together with B. salutis. Four specimens were also collected in a swimming pool in Concepción de Yaguareté Corá.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF980D141ADBF8EC178CFD64.taxon	discussion	Remarks. This is the first record of B. a. antigone from INR. This species was previously recorded from Corrientes Province by López Ruf et al. (2003) and Mazzucconi (2008).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9B0D141ADBFD4B1794FAE2.taxon	materials_examined	Material examined. Yahaveré RS: 2 ♂, 4 ♀, Trin Lagoon, 12. xii. 2014. General distribution. Venezuela, Brazil, Chile, Bolivia, Paraguay, Argentina, Uruguay (Barbosa & Nessimian 2013). Habitat. Buenoa fuscipennis has been found in marshlands, temporary pools (including urban rain pools without aquatic vegetation), ponds, lakes, lagoons (exposed to sunlight and with dense floating vegetation), streams (exposed to sunshine, with submerged and emergent vegetation) and rivers (Bachmann 1962 c; Corigliano et al. 1996; Fontanarrosa et al. 2004, 2013; Muzón et al. 2006). This species has also been found in swimming pools and taken at lights (Angrisano 1982; Torres et al. 2007; Dellapé & Carpintero 2012). At the INR, specimens were collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, this species was collected in the Trin Lagoon from habitats similar to that mentioned above for the Iberá Lagoon.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9B0D151ADBFAC8160DF978.taxon	materials_examined	Material examined. Galarza RS: 13 ♂, 15 ♀, Galarza Lagoon, Vizcaychipi channel, 16. iv. 2013; 1 ♀, Galarza Lagoon, Hermanos Fleita channel, 16. iv. 2013; 4 ♂, 7 ♀, Luna Lagoon, sample 1, 17. iv. 2013; 3 ♂, 4 ♀, Luna Lagoon, sample 2, 17. iv. 2013; 15 ♂, 5 ♀, Luna Lagoon, sample 3, 17. iv. 2013; 4 ♂, 9 ♀, Luna Lagoon, sample 4, 17. iv. 2013; 1 ♀, Luna Lagoon, sample 5, 17. iv. 2013; 2 ♀, Galarza Lagoon, Hermanos Fleita pier, 17. iv. 2013; 1 ♂, 2 ♀, Galarza Lagoon, sample 1, 18. iv. 2013; 1 ♀, Galarza Lagoon, sample 4, 18. iv. 2013; 13 ♂, 4 ♀, flood-prone areas in Hermanos Fleita field, 18. iv. 2013. Itatí RS: 1 ♂, 1 ♀, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 28. iii. 2014; 1 ♀, Itatí Rincón Island, 28 ° 42.73 ’ S, 58 ° 6.69 ’ W, 29. iii. 2014; 1 ♀, Potrero Becasina, flood-prone areas in front of the ranger’s house, 28 ° 44.93 ’ S, 58 ° 7.53 ’ W, 30. iii. 2014; 1 ♀, Estancia El Dorado, pond, 28 ° 45.13 ’ S, 58 ° 7.40 ’ W, 30. iii. 2014; 2 ♂, 2 ♀, Estancia El Dorado, artificial pond, 28 ° 45.60 ’ S, 58 ° 7.23 ’ W, 31. iii. 2014. Laguna Iberá RS: 1 ♀, Iberá Lagoon, Fraga pier, 28 ° 31 ’ 50.00 ’’ S, 57 ° 11 ’ 13.68 ’’ W, 3. xii. 2012; 1 ♀, Lobo Cuá Stream, 28 ° 32 ’ 37.14 ’’ S, 57 ° 12 ’ 3.89 ’’ W, 2. xii. 2012; 2 ♂, Baletón San Pedro, 3. xii. 2012; 1 ♂, 7 ♀, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 14. ii. 2018; 1 ♂, Miriñay channel, 28 ° 34 ’ 13 ’’ S, 57 ° 10 ’ 13 ’’ W, 16. ii. 2018; 2 ♂, 1 ♀, light trap, 28 ° 32 ’ 48.65 ’’ S, 57 ° 11 ’ 48.015 ’’ W, 16. ii. 2018; 1 ♂, 1 ♀, route 40, roadside pond, 17. ii. 2018. San Ignacio RS: 1 ♂, Camping Monterrey, Aguará pedestrian path, long walkway, flood-prone areas, 27 ° 52.213 ’ S, 56 ° 52.977 ’ W, 2 - iii- 2015; 2 ♂, 1 ♀, Camping Monterrey, Aguará pedestrian path, short walkway, marshes, 27 ° 52.152 ’ S, 56 ° 52.884 ’ W, 2. iii. 2015; 1 ♂, 5 ♀, Camping Monterrey, Aguará pedestrian path, artificial well, 27 ° 52.286 ’ S, 56 ° 52.767 ’ W, 4. iii. 2015; 1 ♂, marshlands in front of the ranger’s house, 27 ° 49.413 ’ S, 56 ° 50.929 ’ W, 4. iii. 2015; 1 ♀, road of “ Las 600 ” in front of Monte Grande, marshlands, 27 ° 50.991 ’ S, 56 ° 53.543 ’ W, 5. iii. 2015; 5 ♂, 3 ♀, old pine tree forest of “ Las 600 ”, artificial channel, 27 ° 51.834 ’ S, 56 ° 54.285 ’ W, 5. iii. 2015; 1 ♀, Reserva Privada Don Luis, Monte Don Luis, roadside ditches, 27 ° 52 ’ 0.60 ’’ S, 56 ° 54 ’ 54.18 ’’ W, 16. xi. 2018; 3 ♂, 5 ♀, light trap, 27 ° 49 ’ 26.52 ’’ S, 56 ° 50 ’ 52.26 ’’ W, 16. xi. 2018; 1 ♀, vehicle path, roadside ditches, 27 ° 54 ’ 10.14 ’’ S, 56 ° 53 ’ 14.10 ’’ W, 17. xi. 2018; 1 ♂, vehicle path, roadside ditches, 27 ° 54 ’ 0.24 ’’ S, 56 ° 53 ’ 6.42 ’’ W, 17. xi. 2018; 7 ♂, 7 ♀, Camping Monterrey, Aguará pedestrian path, marshland, 27 ° 52 ’ 14.10 ’’ S, 56 ° 52 ’ 59.70 ’’ W, 18. xi. 2018; 2 ♂, 7 ♀, Camping Monterrey, Aguará pedestrian path, long walkway, marshes, 27 ° 52 ’ 14.58 ’’ S, 56 ° 52 ’ 59.76 ’’ W, 18. xi. 2018; 1 ♂, Camping Monterrey, Aguará pedestrian path, flood-prone areas, 27 ° 52 ’ 22.08 ’’ S, 56 ° 52 ’ 57.84 ’’ W, 19. xi. 2018; 1 ♂, 2 ♀, Camping Monterrey, Aguará pedestrian path, pond and flood-prone areas, 27 ° 52 ’ 26.76 ’’ S, 56 ° 52 ’ 48.78 ’’ W, 19. xi. 2018; 2 ♀, Camping Monterrey, Aguará pedestrian path, pond, 27 ° 52 ’ 17.46 ’’ S, 56 ° 52 ’ 45.18 ’’ W, 19. xi. 2018. San Nicolás RS: 1 ♀, Paraná Lagoon, 28 ° 15.735 ’ S, 57 ° 26.169 ’ W, 14. xii. 2013; 2 ♂, 2 ♀, Carambola Stream, 28 ° 11.067 ’ S, 57 ° 26.567 ’ W, 14. xii. 2013; 17 ♂, 9 ♀, marshland next to the house for the rangers, 15. xii. 2013. Yahaveré RS: 1 ♀, Paso Cardozo, roadside marshes, 28 ° 23 ’ 47.0 ” S, 57 ° 52 ’ 36.2 ” W, 6. xi. 2015; 1 ♀, Caaby Aguilar, marshes, 28 ° 24 ’ 03.4 ” S, 57 ° 51 ’ 31.3 ” W, 8. xi. 2015; 1 ♂, Caaby Aguilar, roadside marshes, 28 ° 24 ’ 03.4 ” S, 57 ° 51 ’ 31.3 ” W, 8. xi. 2015; 1 ♂, Concepción de Yaguareté Corá, house for researchers, swimming pool, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 8. xi. 2015; 5 ♂, 14 ♀, Concepción de Yaguareté Corá, house for researchers, light trap, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 6 – 7. xi. 2015. On the road to Itatí RS: 5 ♂, 7 ♀, Mercedes Department, Pay Ubre Chico Stream, Provincial Route 29, 28. iii. 2014. General distribution. The Lesser Antilles, Colombia, Venezuela, Guyana, Suriname, French Guiana, Brazil, Bolivia, Paraguay, Argentina (Barbosa & Nessimian 2013). Habitat. Buenoa salutis lives in a wide range of aquatic habitats. It was found in ditches (with or without aquatic vegetation, including those between rice fields), dykes (without vegetation), swamps, marshlands (with dense aquatic vegetation), ponds (with floating and emergent vegetation), lakes (natural and artificial), lagoons (with the margins with floating and submerged vegetation), brackish water, in swimming pools, and in stagnant and slow-flowing areas of streamlets, streams (sometimes shaded, with floating and emergent vegetation) and rivers (Truxal 1953; Nieser 1975; Nieser & Alkins-Koo 1991; Torres et al. 2007; Barbosa & Nessimian 2013). It has also been taken at lights (Nieser 1968, 1975; Torres et al. 2007; Barbosa & Nessimian 2013). At the INR, specimens were collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez e t al. 2003) and in Iberá in association with Cabomba caroliniana and Potamogeton sp. (Poi de Neiff 1993). During the present study, B. salutis was collected from margins with dense floating, emergent and submerged vegetation (mainly Pontederia azurea, P. crassipes, P. cordata, Salvinia biloba, Nymphoides indica, Azolla filiculoides, Myriophyllum aquaticum, Egeria densa, Cabomba caroliniana, Sagittaria montevidensis and Cyperus giganteus) in lentic (Galarza Lagoon, Luna Lagoon, Paraná Lagoon, Iberá Lagoon, ponds, marshes, marshlands, ditches and flood-prone areas), and lotic habitats in standing water (Miriñay channel, Carambola Stream, Lobo Cuá Stream, Pay Ubre Chico Stream and artificial channels), mostly in unshaded areas. However, it was also collected at the margins of a shaded roadside ditch without aquatic vegetation and a shaded marsh with emergent vegetation. Additional specimens of this species were taken at lights in Concepción de Yaguareté Corá, San Ignacio Ranger Station and Laguna Iberá Ranger Station, and were collected in a swimming pool in Concepción de Yaguareté Corá. Buenoa salutis was collected together with B. amnigenus in a flood-prone area and B. a. antigone in a pond; these habitats were exposed to sunlight and with emergent vegetation.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9B0D151ADBFAC8160DF978.taxon	discussion	Remarks. Buenoa salutis is one of the most widespread species of water bugs in the INR and the most common species of Buenoa in the Reserve.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9A0D1A1ADBF9771129FE84.taxon	materials_examined	Material examined. Yahaveré RS: 1 ♂, 2 ♀, Medina Lagoon, 13. xii. 2014. General distribution. Venezuela, Brazil, Peru, Bolivia, Paraguay, Argentina (Barbosa & Nessimian 2013). Habitat. Very little information exists regarding the habitat associations of B. unguis. It has been collected from rivers, ponds, as well as in stagnant pools along dry streams and streamlets (Truxal 1953; Melo & Nieser 2004; Barbosa & Nessimian 2013). This species has also been taken at lights and collected in fish tanks (Barbosa & Nessimian 2013). At the INR, only three specimens were collected from the margins of the Medina Lagoon, in shallow waters with submerged, emergent, and floating vegetation.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF9A0D1A1ADBF9771129FE84.taxon	discussion	Remarks. The collection of B. unguis from INR represents the first record from Corrientes Province.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF950D1A1ADBFE2B178CFC9A.taxon	materials_examined	Material examined. Laguna Iberá RS: 1 ♂, 1 ♀, artificial channel, 16. ii. 2018. General distribution. Colombia, Guyana, Suriname, Brazil, Ecuador, Bolivia, Argentina (Takiya et al. 2016). Habitat. This species has been found in lotic habitats (creeks, streams and rivers), and in lentic habitats (ditches, marshes, pools, ponds, lakes and lagoons) including artificial channels and lakes (Truxal 1949; Nieser 1970 a, 1975; Pereira & Melo 2007; Barbosa et al. 2012; Barbosa & Giehl 2014). This species has also been taken at lights and in a swimming pool (Barbosa & Rodrigues 2013). At the INR, only two specimens were collected in an artificial channel with Pontederia crassipes.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF950D1A1ADBFE2B178CFC9A.taxon	discussion	Remarks. This is the first record of M. membranacea from INR. This species was previously recorded from Corrientes Province by López Ruf et al. (2003) and Mazzucconi (2008).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF950D1A1ADBFC521626F937.taxon	materials_examined	Material examined. Itatí RS: 1 ♀, Potrero Becasina, flood-prone areas in front of the ranger’s house, 28 ° 44.93 ’ S, 58 ° 7.53 ’ W, 30. iii. 2014; 2 ♀, Estancia El Dorado, pond, 28 ° 45.13 ’ S, 58 ° 7.40 ’ W, 30. iii. 2014. Laguna Iberá RS: 1 ♀, San Antonio channel, 28 ° 35 ’ 26.69 ’’ S, 57 ° 10 ’ 27.81 ’’ W, 1. xii. 2012; 1 ♀, Lobo Cuá Stream, 28 ° 32 ’ 44.64 ’’ S, 57 ° 12 ’ 15.21 ’’ W, 2. xii. 2012; 1 ♂, Iberá Lagoon, Fraga pier, 28 ° 31 ’ 50.00 ’’ S, 57 ° 11 ’ 13.68 ’’ W, 3. xii. 2012; 1 ♀, Colonia Carlos Pellegrini, light trap, 1. xii. 2012. General distribution. Brazil, Bolivia, Paraguay, Argentina, Uruguay (Moreira et al. 2011 b). Habitat. Notonecta sellata has been found in the margins of pools (including urban rain pools without aquatic vegetation), ponds (with dense aquatic vegetation), lagoons (including urban lagoons without aquatic vegetation), marshlands (with dense aquatic vegetation) and artificial channels, exposed to sunlight (Fontanarrosa et al. 2004; Fernández & López Ruf 2006; Muzón et al. 2006; Torres et al. 2007). It has also been collected in lotic habitats in standing or slow-moving water along the margins of streams (sometimes without aquatic vegetation) and rivers, with emergent and submerged vegetation (Bachmann 1962 c; Nieser 1968, 1970 b; Fernández & López Ruf 2006; Muzón et al. 2006). At the INR, specimens were collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003). During the present study, it was collected from margins with dense floating, emergent and submerged vegetation and organic debris in lentic habitats (Iberá Lagoon, ponds, flood-prone areas and artificial channels) and lotic habitats (Lobo Cuá Stream), in unshaded areas. One specimen was taken at light in Laguna Iberá Ranger Station.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF950D1A1ADBF8B414C4F833.taxon	discussion	Only one genus with five described species is found in Argentina (Coscarón 2017). Three species of Neoplea have been reported from INR (Poi de Neiff 1993, 2003; Estévez et al. 2003), each of which were collected during this study.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF940D1B1ADBFF0B109FFCEA.taxon	materials_examined	Material examined. San Ignacio RS: 4 ♂, 2 ♀, Camping Monterrey, Aguará pedestrian path, long walkway, marshes, 27 ° 52 ’ 14.58 ’’ S, 56 ° 52 ’ 59.76 ’’ W, 18. xi. 2018. Yahaveré RS: 1 ♂, Caaby Aguilar, roadside marshes, 28 ° 24 ’ 03.4 ” S, 57 ° 51 ’ 31.3 ” W, 8. xi. 2015. General distribution. Argentina (Bachmann & López Ruf 1994). Habitat. Neoplea argentina has been found in lagoons, lakes, marshes, and in standing or slow-moving water of streams and rivers (Merlassino & Schnack 1979; Poi de Neiff 1983; Bachmann & López Ruf 1994; Poi de Neiff & Neiff 2006; Fontanarrosa et al. 2013). This species was previously recorded from Iberá in association with Egeria najas, Salvinia biloba and Potamogeton sp. (Poi de Neiff 1993, 2003). During the present study, it was collected from marshes with dense floating, emergent and submerged vegetation (mainly S. biloba) in unshaded and shaded areas. This species was collected in association with the above mentioned vegetation in the Paraná River (Argentina) (Poi de Neiff & Neiff 2006).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF940D1B1ADBFF0B109FFCEA.taxon	discussion	Remarks. Neoplea argentina was collected in INR together with N. maculosa. The records from Brazil need confirmation (Bachmann 1968; Nieser & Melo 1997; Heckman 1998; Souza et al. 2006).	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF940D1B1ADBFCC017A8F981.taxon	materials_examined	Material examined. San Ignacio RS: 1 ♀, Camping Monterrey, Aguará pedestrian path, long walkway, marshes, 27 ° 52 ’ 14.58 ’’ S, 56 ° 52 ’ 59.76 ’’ W, 18. xi. 2018. Yahaveré RS: 1 ♂, Medina Lagoon, 13. xii. 2014; 1 ♂, 1 ♀, Concepción de Yaguareté Corá, house for researchers, swimming pool, 28 ° 23 ’ 25.7 ” S, 57 ° 53 ’ 15.9 ” W, 8. xi. 2015. General distribution. Colombia, Suriname, Brazil, Peru, Bolivia, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. Neoplea maculosa has been found in densely vegetated lagoons, lakes, ponds, pools, swamps, marshlands, marshy ponds without aquatic vegetation and little plant debris, and urban rain pools without aquatic vegetation (Nieser 1975; Fontanarrosa et al. 2004, 2013; Fernández & López Ruf 2006; Torres et al. 2007). This species has also been found in rivers and streams (Bachmann 1968; Poi de Neiff 1990; Bachmann & López Ruf 1994; Vianna & Melo 2003; Poi de Neiff & Neiff 2006). It seems to prefer clear waters with dense submerged vegetation (Bachmann 1962 c). At the INR, specimens were collected from the margins of the Iberá Lagoon in shallow waters with emergent and floating vegetation (Estévez et al. 2003) and in association with Egeria najas, Leersia hexandra, Ludwigia peploides, Pontederia azurea and Potamogeton sp. (Poi de Neiff 1993, 2003). During the present study, it was collected from unshaded margins with dense floating, emergent and submerged vegetation (mainly Salvinia biloba) in marshes and in the Medina Lagoon. Two specimens were collected in a swimming pool in Concepción de Yaguareté Corá.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF940D1B1ADBFCC017A8F981.taxon	discussion	Remarks. Neoplea maculosa was found together with N. argentina.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
D7768787FF940D181ADBF92D17BFFEA0.taxon	materials_examined	Material examined. Laguna Iberá RS: 1 ♀, Iberá Lagoon, Paso Claro, 28 ° 33 ’ 29 ’’ S, 57 ° 11 ’ 37 ’’ W, 16. ii. 2018. Yahaveré RS: 1 ♂, Medina Lagoon, 13. xii. 2014. General distribution. Colombia, Brazil, Bolivia, Paraguay, Argentina (Moreira et al. 2011 b). Habitat. Very little information exists regarding the habitat associations of N. semipicta. It has been collected in lagoons in association with Pistia stratiotes, Pontederia crassipes and Egeria najas (Neiff & Poi de Neiff 1979; Poi de Neiff 1979). This species was previously recorded from Iberá in association with Salvinia biloba (Poi de Neiff 2003). During the present study, it was collected from unshaded margins with dense floating, emergent and submerged vegetation (mainly Pontederia azurea) in the Iberá Lagoon and Medina Lagoon.	en	Mazzucconi, Silvia Ana, Reyes, Cristina Armúa De, Estévez, Ana Lía (2022): Aquatic and semiaquatic Heteroptera (Insecta: Hemiptera) from Iberá Natural Reserve (Corrientes Province, Argentina). Zootaxa 5104 (4): 451-505, DOI: 10.11646/zootaxa.5104.4.1
