taxonID	type	description	language	source
03AD87F3FFF2FFD33391F8D3421A7702.taxon	materials_examined	Type material. Holotype: ♁ imago in alcohol (genitalia on slide) from Brazil, Rondônia State, Ji-Paraná municipality, Urupá River, S 11 ° 02 ’ 07.8 ”, W 62 ° 08 ’ 41.5 ”, 23. viii. 2022, Nascimento, S. R. S., Cruz, P. V., Lima, C. R. T. cols. (INPA-EPH 000042). Paratypes: 15 ♁ imagos in alcohol (light trap), same data as holotype (INPA-EPH 000043); five ♀ imagos in alcohol (light trap), same data as holotype (INPA-EPH 000045); one ♁ nymph in alcohol (mouthparts, legs and opercular gills on slide), same data as holotype (INPA-EPH 000044).	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFF2FFD33391F8D3421A7702.taxon	diagnosis	Diagnosis. Male: 1) forceps margins slightly sinuous; 2) penis cylindrical (with rectangular outline in ventral view), apically rounded and not laterally projected. Eggs: 1) micropyle linear with narrow and of moderate length micropylar canal, preceded by an scarcely visible oval sperm guide; 2) two polar caps forming a spiral of fine threads with about 13 terminal knobs. Nymph: 1) lateral margins of the pronotum rounded and broader posteriorly; 2) middle and hind coxa semicircular, without projection; 3) fore tarsal claws a row of small denticles basally, middle tarsal claws with six small denticles basally, hind tarsal claws with several small denticles; 4) sternum IX with posterior margin straight.	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFF2FFD33391F8D3421A7702.taxon	description	Description. Male imago. Body length: 2.5 – 3.0 mm (n = 4); forewing: 2.2 – 2.4 mm; foreleg: 2.5 – 2.9 mm; hind leg: 1.5 – 1.6 mm; cercus: 7.7 – 8.2 mm. Ratios. Foreleg 1.6 – 1.8 × the length of hind leg. Ratio of first segment of the foretarsi length to 2 nd: 3 rd: 4 th: 5 th = 0.1 – 0.2: 0.3 – 0.4: 0.3 – 0.5: 0.5 – 0.8. Genitalia: styliger plate length 2.4 – 2.8 × width; forceps length 7.2 – 8.5 × width at half length; distance between extreme lateral points of forceps bases to forceps length = 1.2 – 1.4 mm. Coloration. Head: light brown shaded with dark in dorsal view (Fig. 2 A); venter of head yellowish (Fig. 2 D). Antenna: scape and pedicel pale, flagellum grayish (Figs. 2 A – C). Thorax. Prothorax light brown translucent shaded with black on lateral margin (Figs. 2 A – C). Meso- and metanotum light brown shaded with gray on carinae; mesonotum light brown; pleurae and sterna light brown. Wing. forewings hyaline, veins translucent except C, Sc and Rs grayish. Legs. Foreleg dark brown shaded with black, middle and hind femur with subapical pale marks and apically blackish. Abdomen. Terga pale with abdominal segments I – II with a grayish band on medial area and darker laterally, segments III – VI grayish medially, segments VII – VIII yellowish medially and darker laterally, segment IX slightly grayish medially, segment X yellowish (Fig. 2 A). Sterna pale with segments VII – IX yellowish (Fig. 2 B). Pleura pale (Fig. 2 B). Genitalia. Sternum IX with strongly colored sclerites (Figs. 2 B, C). Forceps dark brown, penis yellowish (Figs. 2 C, E). Caudal filaments pale translucent. (Figs. 2 A – C). Morphology. Antenna: Base of antennal flagellum dilated. Thorax. Pronotum with lateral margins of the pronotum rounded and broader posteriorly (Fig. 2 A); prosternal longitudinal ridges forming a triangle shaped structure, closed anteriorly and with straight lateral margins (Fig. 2 D). Abdomen. Lateral filaments and fingerlike process on tergum II lacking. Genitalia. Styliger plate sclerotized, length 2.4 – 2.8 × width, anterior margin almost straight and posterior margin straight, covering the basal 1 / 3 of penis; central sclerite elongate dome-shaped; apophyses long and thin, basolateral sclerites weakly discernible, lateral sclerites slender. Forceps long and slender, progressively tapering towards the apex, with margins slightly sinuosity and not fused to lateral margins of styliger plate. Penis cylindrical and apically rounded (with rectangular outline in ventral view), completely fused and not laterally projected; ventral surface with tubercles and groove (Figs. 2 E and 3). Female imago. Body length: 3.7 – 4.2 mm (n = 5); forewing: 3.0 – 3.2 mm; foreleg: 1.9 – 2.1 mm; cercus: broken off. Thorax: same as males except mesonotum with more evident dark brown sutures, anterior margin brownish and grayish medially (Fig. 4 A); katepisternum shaded with gray while mesopleural sclerites are light brown (Fig. 4 B). Abdomen: same as males except abdomen with segments I grayish medially; abdominal sternum IX with posterior margin straight, not projected (Figs. 4 A, C). Lateral filaments absent. Egg. Length: 104 – 119 μm; width: 79 – 88 μm. Coloration yellowish. Oval-shaped with length 1.2 – 1.4 × width. Chorion surface with small pores (Fig. 5 B). Micropyle linear with narrow and of moderate length micropylar canal, preceded by a scarcely visible oval sperm guide (Figs. 5 A, C). Two polar caps forming a spiral of fine threads with about 13 terminal knobs (Figs. 5 A, C, D). Description. Mature male nymph. Length: Body, 3.7 mm, cercus, broken off. Ratios: Mouthparts. Width of maxillary palp segment I 1.7 × width of segment II; length of maxillary palp segment I 1.6 × length of segment II; length of maxillary palp segment I 0.9 × length of segment III; length of labrum 0.4 × its maximum width. Foreleg. Length of forefemur 3.1 × its maximum width. Coloration and Morphology. Head: Brownish; brownish with black markings on posterior margin of occiput; also shaded black behind eyes; mouthparts light brown. Antenna: Flagellum brownish, pedicel paler (Figs. 6 A – C). Posterior margin of head with setae. Mouthparts: Labrum with lateral margins rounded, with long subapical setae over the dorsal surface (Fig. 7 A); linguae of hypopharynx medially excavated (Fig. 7 B); Mandibles with subapical setae varying in size on inner margin (Figs. 7 E, F); right mandible with outer margin with a dorsolateral row of long setae (Fig. 7 F). Thorax: Nota brownish with brown sutures. Pronotum with anterior margin light brown, lateral zones shaded with black (Fig. 6 A). Mesonotum with brownish macula anterior to wing bud bases, and with medial blackish lines (Fig. 6 A). Thoracic sterna brownish (Fig. 6 C). Legs brownish, femora with blackish marks on subapical zones and paler basally on median and hind femora; tibiae and tarsi blackish on medial zones (Figs. 6 A – C, 8 A – C). Fore coxa well-developed without projection, middle and hind coxa semicircular without projection (Figs. 8 A – C). Fore coxa with long setae on outer margin, dorsal margin of fore femora with setae robust, varying in size, mostly on apical half, outer margin with simple and robust setae varying in size, setae simple varying in size on basal half of inner margin (Fig. 8 A); dorsal margin of the median femora with robust setae, varying in size, mostly on middle region, outer margin with simple and robust setae varying in size on apical half (Fig. 8 B); dorsal margin of the hind femora with robust setae, varying in size, mostly on middle region, outer margin with long and robust setae on apical half (Fig. 8 C). Tibiae with robust setae on inner margins, varying in size (Figs. 8 A – C). All tarsi with one row of robust setae on inner margin (Figs. 8 A – C). Fore tarsal claws a row of small denticles basally, middle tarsal claws with six small denticles basally, hind tarsal claws with several small denticles (Figs. 8 D – F). Abdomen: Terga brownish; segments I – II with a grayish band on medial area and darker laterally; segments III – VI grayish medially, segments VII – VIII brownish medially and darker laterally, segment IX slightly grayish medially, segment X brownish (Fig. 9 A). Sterna light brown, with only small grayish medial and lateral marks (Fig. 6 C), tergum II with small median projection on posterior margin, triangular with rounded tip. Operculate gills brownish, almost completely shaded with black and laterally with two blackish spots (Figs. 6 A, 9 C). Operculate gills with submarginal ventral, microtrichia elongated shape and fringed apically, medial Y-ridge complete and well developed; dorsal surface smooth with long, simple setae (Fig. 9 C). Posterolateral projections on abdominal segments III – VI long and pointed (Fig. 9 A). Sternum IX with posterior margin straight, laterally posteriorly with long simple setae (Fig. 9 B). Caudal filaments brownish (Figs. 6 A – C, 9 A). Life cycle association. Male genitalia extracted from mature nymph and compared with the male imagos (Fig. 9 B).	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFF2FFD33391F8D3421A7702.taxon	etymology	Etymology. The name of the species is in memory of the extinct native Urupá population that lived on the banks of the river formerly called Ji-Paraná. It has been considered extinct since the beginning of the 20 th century, due to territorial disputes with other tribes, but above all to the strong colonizing presence that led to slave labor and the spread of various diseases, with their descendants being culturally eradicated around 1918. The specific epithet is a noun in apposition.	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFAFFD43391F94A41A470BA.taxon	distribution	Distribution. Brazil: states of Bahia, Ceará, Espírito Santo, Mato Grosso, Minas Gerais, Maranh „ o, Paraíba, Pernambuco, Roraima and Piauí. New record: Rondônia State.	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFAFFD43391F94A41A470BA.taxon	materials_examined	Material examined. One ♁ imago (light trap), Brazil, Rondônia State, Rolim de Moura municipality, Experimental Farm of UNIR, S 11 ° 34 ’ 56.8 ”, W 61 ° 45 ’ 51.4 ”, 14. viii. 2022, Nascimento, S. R. S., Cruz, P. V., Lima, C. R. T. cols. (INPA); three ♁ imagos (light trap), Brazil, Rondônia State, Rolim de Moura municipality, Waterfall, road 192 south, S 11 ° 50 ’ 34.8 ”, W 61 ° 42 ’ 50.3 ”, 15. viii. 2022, Nascimento, S. R. S., Cruz, P. V., Lima, C. R. T. cols. (INPA); 12 ♁ imagos (light trap), same data except, 15. viii. 2022; three ♁ imagos (light trap), Brazil, Rondônia State, Ji-Paraná municipality, Urupá River, S 11 ° 02 ’ 07.8 ”, W 62 ° 08 ’ 41.5 ”, 23. viii. 2022, Nascimento, S. R. S., Cruz, P. V., Lima, C. R. T. cols. (INPA).	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFAFFD43391F94A41A470BA.taxon	discussion	Comments. This species can be characterized by the presence of pointed forceps, abruptly sharpening distally, forming a long tip at the apex, and penis dorsally and laterally protruding (adapted from Lima et al. 2016 a). After a morphological comparison analysis, no variations were observed between the specimens collected in the State of Rondônia and the original description of B. elidioi.	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFDFFD43391FE1B41247586.taxon	distribution	Distribution. Bolivia. Colombia. Brazil: states of Amazonas, Mato Grosso, Roraima, Piauí. New record: Rondônia State.	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFDFFD43391FE1B41247586.taxon	materials_examined	Material examined. One ♁ imago (light trap), Brazil, Rondônia State, Rolim de Moura municipality, Waterfall, road 192 south, S 11 ° 50 ’ 34.8 ”, W 61 ° 42 ’ 50.3 ”, 21. viii. 2022, Nascimento, S. R. S., Cruz, P. V., Lima, C. R. T. cols. (INPA); four ♁ imagos (light trap), Brazil, Rondônia State, Ji-Paraná municipality, Urupá River, S 11 ° 02 ’ 07.8 ”, W 62 ° 08 ’ 41.5 ”, 23. viii. 2022, Nascimento, S. R. S., Cruz, P. V., Lima, C. R. T. cols. (INPA); two ♁ imagos (light trap), Brazil, Rondônia State, Costa Marques municipality, Guaporé River, S 12 ° 27 ’ 50.0 ”, W 64 ° 10 ’ 32.8 ”, 25. viii. 2022, Nascimento, S. R. S., Cruz, P. V., Lima, C. R. T. cols. (INPA).	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFDFFD43391FE1B41247586.taxon	discussion	Comments. Brasilocaenis irmleri it is easily distinguished by the very long styliger plate with posterior margin rounded, forceps enlarged near base narrowing toward the apex, and fused to lateral margins of the styliger plate (adapted from Puthz 1975). This species is related to the group of South American Caeninae with apically pointed forceps. The specimens collected in the State of Rondônia did not show any morphological variation when compared to the original description of B. irmleri.	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFDFFD43391FB06418B7618.taxon	distribution	Distribution. Colombia. Brazil: states of Goiás, Pernambuco, Roraima, Piauí. New record: Rondônia State.	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFDFFD43391FB06418B7618.taxon	materials_examined	Material examined. 10 ♁ imagos (light trap), Brazil, Rondônia State, Rolim de Moura municipality, Waterfall, road 192 south, S 11 ° 50 ’ 34.8 ”, W 61 ° 42 ’ 50.3 ”, 21. viii. 2022, Nascimento, S. R. S., Cruz, P. V., Lima, C. R. T. cols. (INPA).	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFDFFD43391FB06418B7618.taxon	discussion	Comments. Caenis chamie can be characterized by the straight hind margin of penis, genital sclerites sclerotized and discernible, and styliger plate projected, covering the penis (adapted from Alba-Tercedor & Mosquera 1999). Specimens from Rondônia were compared with photographs of the holotype of male imago. Small variations in the shape of the forceps were observed, with some specimens presenting forceps longer and slender, with subapical constriction. Variations on the forceps were also previously commented on by Alba-Tercedor & Mosquera (1999). The most noticeable variation is the lateral sclerite, with evident sclerotization, tape format and broad base; this structure is barely visible in the holotype of C. chamie.	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFDFFD73391F885471870E2.taxon	distribution	Distribution. Brazil: states of Bahia, Espírito Santo, Mato Grosso, Pará, Pernambuco, Roraima, Piauí. New record: Rondônia State.	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFDFFD73391F885471870E2.taxon	materials_examined	Material examined. 15 ♁ imagos (light trap), Brazil, Rondônia State, Rolim de Moura municipality, Experimental Farm of UNIR, S 11 ° 34 ’ 56.8 ”, W 61 ° 45 ’ 51.4 ”, 14. viii. 2022, Nascimento, S. R. S., Cruz, P. V., Lima, C. R. T. cols. (INPA); one ♁ imago (light trap), Brazil, Rondônia State, Urupá municipality, Urupá River, S 11 ° 02 ’ 07.8 ”, W 62 ° 08 ’ 41.5 ”, 23. viii. 2022, Nascimento, S. R. S., Cruz, P. V., Lima, C. R. T. cols. (INPA).	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFDFFD73391F885471870E2.taxon	discussion	Comments. Caenis fittkaui can be differentiated from other species of Caenis by the following characteristics: apex of forceps sharp and directed posteriorly, lobes of penis fused, forming a rounded apex and with small tubercles distributed on the ventral surface (adapted from Malzacher 1986). The specimens studied did not show any morphological variation when compared with the original description of C. fittkaui.	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFEFFD73391FDA24635758C.taxon	distribution	Distribution. Bolivia. Ecuador. Brazil: states of Espírito Santo, Rio Grande do Sul. New record: Rondônia State.	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFEFFD73391FDA24635758C.taxon	materials_examined	Material examined. Two ♁ subimagos (light trap), Brazil, Rondônia State, Rolim de Moura municipality, Waterfall, road 192 south, S 11 ° 50 ’ 34.8 ”, W 61 ° 42 ’ 50.3 ”, 21. viii. 2022, Nascimento, S. R. S., Cruz, P. V., Lima, C. R. T. cols. (INPA); 25 ♁ imagos (light trap), Brazil, Rondônia State, Ji-Paraná municipality, Urupá River, S 11 ° 02 ’ 07.8 ”, W 62 ° 08 ’ 41.5 ”, 23. viii. 2022, Nascimento, S. R. S., Cruz, P. V., Lima, C. R. T. cols. (INPA); three nymph, Brazil, Rondônia State, Ji-Paraná municipality, Urupá River, S 11 ° 02 ’ 07.8 ”, W 62 ° 08 ’ 41.5 ”, 25. viii. 2016, Cruz, P. V. col. (INPA).	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
03AD87F3FFFEFFD73391FDA24635758C.taxon	discussion	Comments. Latineosus sigillatus can be characterized by the relatively large size (male body ca. 4 mm, female ca. 5 mm); with characteristic blackish marks on abdominal terga, presence of vestiges of posterolateral projections on abdominal segments IV – VI, male subgenital plate broadly emarginated posteriorly, ratio of forceps length / subbasal width 8.9 (adapted from Molineri 2014). Variations related to color pattern were observed in specimens from Rondônia. It was observed that the pronotum does not present a medial T-shaped black mark, abdomen without blackish median marks on terga VII – IX, and head without paired sublateral black marks near hind margin.	en	Nascimento, Stênio R. S., Cruz, Paulo V., Lima, Lucas R. C., Lima, Cláudia R. T., Hamada, Neusa, Ale-Rocha, Rosaly (2023): New species and records of Caenidae Newman, 1853 (Insecta: Ephemeroptera) from Rondônia State, Northern Brazil. Zootaxa 5339 (3): 237-255, DOI: 10.11646/zootaxa.5339.3.2, URL: http://dx.doi.org/10.11646/zootaxa.5339.3.2
