Family Diplostomidae Poirier, 1886
Austrodiplostomum Szidat & Nani, 1951
Austrodiplostomum mordax Szidat & Nani, 1951
Syn.: Diplostomum (A.) mordax (Szidat & Nani) Ostrowski de Núñez, 1982. Diplostomum (A.) compactum (Lutz, 1928) Dubois, 1970.
Natural host: Phalacrocorax brasilianus (Gmelin) .
Experimental hosts: Gallus gallus domesticus (L.), Pitangus sulphuratus bolivianus (Lafresnaye) .
Site of infection: intestine.
Locality: Buenos Aires Province.
Life history: Hi1: Biomphalaria peregrina (d’Orbigny) (experimental and natural host from Limay River, Neuquén Province), B. straminea (Dunker) (experimental host). Hi2: Odontesthes hatcheri (Eigenmann), O. bonariensis (Valenciennes), O. smitti, (Lahille), Percichthys trucha (Valenciennes), Aplochiton taeniatus Jenyns, Galaxias maculatus (Jenyns), G. p lat e i Steindachner, Onchorhynchus mykiss (Walbaum), Jenynsia lineata (Jenyns) (natural hosts from Buenos Aires, Córdoba, La Rioja, Jujuy, Tucumán, Río Negro, Neuquén and Chubut Provinces); Cnesterodon decemmaculatus (Jennyns), Phalloceros caudimaculatus (Hensel) (experimental hosts); metacercariae in brain.
References: Szidat & Nani (1951, 1952), Szidat (1956, 1964, 1969), Fuster de Plaza & Boschi (1957), Ostrowski de Núñez (1964, 1968a, 1970, 1977, 1982, 1992a), Ortubay et al. (1989, 1994), Viozzi & Flores (2002).
Diplostomum v. Nordmann, 1832
Diplostomum minutum Szidat, 1964
Hosts: Larus dominicanus Lichtenstein, L. maculipennis Lichtenstein. Site of infection: intestine.
Localities: Huechulaufquen Lake, Neuquén Province and Rosario Lake, Chubut Province Life history: Hi1: unknown. Hi2: Gymnotus sp. (natural host) from Chaco Province; metacercariae in
brain and medulla.
References: Szidat (1964), Niewiadomska et al. (1989), Kreiter & Semenas (1997).
Dolichorchis Dubois, 1961
Dolichorchis bonariensis Ostrowski de Núñez, 1970 Syn.: Diplostomum (Dolichorchis) bonariensis Ostrowski de Núñez, 1970 Host: Phalacrocorax brasilianus (Gmelin) . Site of infection: intestine.
Locality: Buenos Aires city.
Life history: Hi1: unknown. Hi2: probably Curimatorbis platanus (Günther) from Obras Sanitarias, Bue
nos Aires city; metacercariae in the brain. Material deposited: MACN.
Reference: Ostrowski de Núñez (1970).
Dolichorchis lacombeensis Lunaschi & Drago, 2006 Host: Ardea cocoi Linnaeus.
Site of infection: intestine
Locality: Lacombe lagoon, Buenos Aires Province. Material deposited: MLP, 5292.
Reference: Lunaschi & Drago (2006a).
Hysteromorpha Lutz, 1931
Hysteromorpha triloba (Rudolphi, 1819) Lutz, 1931
Host: Phalacrocorax brasilianus (Gmelin) .
Site of infection: intestine.
Localities: Río de la Plata, Buenos Aires Province, Obras Sanitarias, Buenos Aires city; Embalse, Cór
doba Province and Río de la Plata.
References: Szidat & Nani (1951), Ostrowski de Núñez (1970, 1992a).
Neodiplostomum Raillet, 1919
Neodiplostomum travassosi Dubois, 1937
Hosts: Caracara plancus (Miller), Phalacrocorax brasilianus (Gmelin) . Site of infection: small intestine.
Locality: Clorinda, Formosa Province.
Material deposited: MLP, 5330, 5331; CNHE 5312. Reference: Lunaschi & Drago (2005).
Posthodiplostomum Dubois, 1936
Posthodiplostomum nanum Dubois, 1937
Natural hosts: Butorides striata (Linnaeus), Ixobrychus involucris (Vieillot), Ardea alba Linnaeus, A.
alba egretta Gmelin, Plegadis chihi (Vieillot) .
Experimental Hosts: Gallus gallus domesticus (L.), Anas platyrhynchos L. Site of infection: small intestine.
Localities: La Plata Zoological Garden, La Plata and Punta Blanca, Buenos Aires Province; Obras Sani
tarias, Buenos Aires city.
Life history: Hi1: Gundlachia concentrica (d'Orbigny) (experimental host). Hi2: Jenynsia lineata (Jenyns), Phalloceros caudimaculatus (Hensel), Cnesterodon decemmaculatus (Jenyns) (experimental and natural hosts from Río de La Plata); neascustype metacercariae encyst in body cavity and kidney.
Material deposited: MLP.
References: Boero et al. (1972b), Ostrowski de Núñez (1973, 1992a), Doma & Ostrowski de Núñez
(1994), Digiani (2000).
Posthodiplostomum mignum Boero, Led & Brandetti, 1972 b Host: Ardea cocoi Linnaeus.
Locality: La Plata Zoological Garden, La Plata, Buenos Aires Province. Site of infection: small intestine.
Reference: Boero et al. (1972b).
Posthodiplostomum obesum Lutz, 1928
Syns.: Neodiplostomum sp. Ostrowski de Núñez, 1970
Neodiplostomum (N.) pseudoconicum (Ostrowski de Núñez) Nasir & Díaz, 1972 Host: Phalacrocorax brasilianus (Gmelin) .
Site of infection: intestine.
Locality: Quequén, Buenos Aires Province.
References: Ostrowski de Núñez (1970), Nasir & Díaz (1972), Dubois (1977).
Sphincterodiplostomum Dubois, 1936
Sphincterodiplostomum musculosum Dubois, 1936 Host: Ardea alba Linnaeus.
Site of infection: intestine.
Locality: Clorinda, Formosa Province.
Life history: Hi1: unknown. Hi2: Hoplias malabaricus (Bloch) (natural host) from Chaco Province; meta
cercariae in the eye’s orbit.
Material deposited: MLP, 5404.
References: Szidat (1969), Lunaschi & Drago (2006b).
Tylodelphys Diesing, 1850
Tylodelphys adulta Lunaschi & Drago, 2004
Host: Podiceps major (Boddaert) . Site of infection: intestine.
Locality: Lacombe lagoon, Buenos Aires Province. Material deposited: MLP, holotype 5309, paratypes 5310, 5311. Reference: Lunaschi & Drago (2004).
Family Strigeidae Railliet, 1919
Apatemon Szidat, 1928
Apatemon gracilis (Rudolphi, 1819) Szidat, 1928 Host: Cygnus melanocorypha (Molina) .
Site of infection: intestine.
Locality: not reported.
Reference: Boero et al. (1972a).
Apatemon bdellocystis Lutz, 1912
Host: Cygnus melanocorypha (Molina) .
Site of infection: small intestine.
Locality: La Plata Zoological Garden, La Plata, Buenos Aires Province. References: Boero & Led (1968), Ostrowski de Núñez (1992a). Comments: Ostrowski de Núñez (1992a) erroneously reported that Boero & Led (1968) found this spe
cies in Coscoroba coscoroba (Molina) .
Apharyngostrigea Ciurea, 1927
Apharyngostrigea simplex (Johnston, 1904)
Host: Egretta thula (Molina).
Site of infection: intestine.
Locality: Buenos Aires Zoological Garden, Buenos Aires city. Life history: Hi1: Biomphalaria straminea (Dunker) (experimental host). Hi2: Cnesterodon decemmaculatus (Jenyns), Cichlasoma facetum (Jennyns) (experimental hosts); metacercariae in body cavity.
References: Ostrowski de Núñez (1989, 1992a).
Cardiocephaloides Sudarikov, 1959
Cardiocephaloides brandesii (Szidat, 1928) Sudarikov, 1959 Host: Larus maculipennis Lichtenstein.
Site of infection: intestine.
Locality: Huechulaufquen Lake, Lanín National Park, Neuquén Province. Reference: Szidat (1964).
Cardiocephaloides physalis (Lutz, 1927) Dubois, 1937 Host: Spheniscus magellanicus (Forster) .
Site of infection: intestine.
Locality: not reported.
Reference: Boero et al. (1972a)
Comments: Timi et al. (1999) hypothesized that the metacercariae found in eyes of Engraulis anchoita Hubbs & Marini from Argentine and Uruguayan Seas and described as Cardiocephaloides sp. (MLP, 4555), probably belong to the species C. physalis .
Cardiocephaloides sp.
Host: Spheniscus magellanicus (Forster) .
Site of infection: intestine.
Locality: Península Valdés, Chubut Province. Reference: Pazos et al. (2003).
Ophiosoma Szidat, 1928
Ophiosoma microcephalum Szidat, 1928
Hosts: Milvago chimango (Vieillot), Buteo magnirostris (Gmelin) . Site of infection: intestine.
Localities: Urribelarrea, Buenos Aires Province; La Marcela farm, Pirané, Formosa Province. Material deposited: MLP, 5508.
References: Boero & Led (1971), Lunaschi & Drago (2006c).
Parastrigea Szidat, 1928
Parastrigea brasiliana (Szidat, 1928) Dubois, 1964
Syn. Apharyngostrigea brasiliana (Szidat, 1928) Szidat, 1929 Hosts: Ardea alba Linnaeus, Bubulcus ibis (Linnaeus) . Site of infection: intestine.
Localities: La Plata Zoological Garden, La Plata; De Monte lagoon, Buenos Aires Province. References: Boero et al. (1972b), Labriola & Suriano (1998).
Strigea Abildgaard, 1790
Strigea falconis brasiliana Szidat, 1929 Host: Buteo magnirostris (Gmelin) . Site of infection: intestine.
Locality: La Marcela farm, Pirané, Formosa Province. Material deposited: MLP, 5506.
Reference: Lunaschi & Drago (2006c).
Strigea magniova Dubois, 1988
Host: Buteo magnirostris (Gmelin) . Site of infection: intestine.
Locality: La Marcela farm, Pirané, Formosa Province. Material deposited: MLP, 5507.
Reference: Lunaschi & Drago (2006c).