taxonID	type	description	language	source
03BD87ED6626893AFF233E85FD957172.taxon	description	(Figures 3 A – C; 4 A – G; 5 A – G)	en	De Lima, Cláudia R. T., Massariol, Fabiana Criste, Cruz, Paulovilela, Hamada, Neusa (2022): Two new species of small minnow mayfly (Ephemeroptera: Baetidae) from a mine-tailing dam disaster area in Minas Gerais, Brazil. Zootaxa 5196 (2): 265-279, DOI: https://doi.org/10.11646/zootaxa.5196.2.7
03BD87ED6626893AFF233E85FD957172.taxon	materials_examined	Material examined. Holotype. Larva (on slide), BRAZIL, Minas Gerais State, Ipaba, Rio Doce 42 º 25 ′ 33 ″ W, 19 º 22 ′ 20 ″ S, 26. VIII. 2018, 210 m. a. s. l., coll. Bramuth A. C. (INPA). Paratypes: 2 larvae (on slide), same data as holotype; 3 larvae (on slide), same data as holotype, except 13. II. 2019; 2 larvae (on slide), Minas Gerais State, Marliéria, Rio Doce, 42 º 30 ′ 08 ″ W, 19 º 41 ′ 42 ″ S, 31. I. 2019, 247 m. a. s. l., coll. Bramuth A. C., Massariol F. C., (INPA).	en	De Lima, Cláudia R. T., Massariol, Fabiana Criste, Cruz, Paulovilela, Hamada, Neusa (2022): Two new species of small minnow mayfly (Ephemeroptera: Baetidae) from a mine-tailing dam disaster area in Minas Gerais, Brazil. Zootaxa 5196 (2): 265-279, DOI: https://doi.org/10.11646/zootaxa.5196.2.7
03BD87ED6626893AFF233E85FD957172.taxon	description	Description. Larva. Body length 3.1 – 3.4 mm. Coloration of light yellow with shorts brown marks over terga. Head. Antenna: flagellum with minute spines on apex of each flagellomere. Labrum (Figs 4 A, B): rectangular, length about 0.6 × maximum width; distal margin without medial emargination; ventral surface with one row of 14 spine-like setae on distolateral and distal margins, distal margin with medial spine-like setae; dorsal surface, at distal medial margin, with 3 minute, blunt and spatulate setae, with one medial row of long thin setae and many thin setae over surface. Left mandible (Fig. 4 C): incisors cleft, outer and inner set of incisors respectively with 4 + 3 denticles; prostheca robust, bifid, inner lobe with outer margin pectinate; margin between prostheca and mola concave, subtriangular process wide and pointed, with large spine on outer margin; tuft of spine-like setae at base of mola present; denticles of mola not constricted; mola with two large denticle; outer margin convex. Right mandible (Fig. 4 D): incisors cleft; outer and inner set of incisors respectively with 3 + 2 denticles; prostheca thin, bifurcated at apex, outer lobe pectinate; margin between prostheca and mola concave; tuft of spine-like setae at base of mola absent; denticles of mola not constricted; apex of mola with one simple setae; process of mola triangular; outer margin convex. Hypopharynx (Fig. 4 E): lingua subquadrangular, longer than superlingua, without distomedial projection, tuft of setae at apex; superlingua rounded, with short, thin, simple setae scattered over distal margin. Maxilla (Fig. 4 F): maxillary palp 2.3 × length of galea-lacinia; segment I subequal in length of galea-lacinia; segment II robust, covered by thin setae; inner margin of galea-lacinia with two spine-like setae. Labium (Fig. 4 G): glossa with parallel margins, apex with inner margin concave, same length of paraglossa; dorsal surface with 3 small spine-like setae at apex, one transverse row of 13 robust spine-like setae on apical third; ventral surface covered by thin long setae. Paraglossa curved inward; dorsal surface with 1 long and robust spine-like setae at apex, apical third with one row of 3 long and robust spine-like setae, near inner margin with one row of 7 long and robust spine-like setae; outer margin with one row of 24 long and thin spine-like setae from base to apex; ventral surface with one row of 6 long and robust spine-like setae at middle. Labial palp with segment I 0.6 × length of segments II and III combined; segment I covered by micropores (not illustrated); segment II with outer margin covered by long thin setae, inner margin bare, inner distal protuberance of segment II rounded and expanded, covered with thin, long simple setae; segment III triangular, covered by thin simple setae, length 0.8 × width, outer margin covered by long thin setae; dorsal surface with 7 – 9 robust spine-like setae on distal margin; ventral surface with 5 robust spine-like setae on distal margin. Thorax. Foreleg (Figs 5 A, B). Femur: dorsal margin with one row of 12 – 14 short, blunt and spatulated setae, apex with a pair short, blunt and spatulated setae; anterior surface with one row of 11 – 13 short, blunt and spatulated setae near to dorsal margin, and one row of small spine-like setae near to ventral margin; posterior surface with one row of 11 – 12 short, blunt and spatulated setae near dorsal margin; ventral margin with one row of 11 short spinelike setae. Tibia: dorsal margin bare, ventral margin with one row of 8 – 10 short spine-like setae; patella-tibial suture present. Tarsus: dorsal margin bare, ventral margin with one row of 9 – 10 short spine-like setae. Claws 1.0 – 1.2 × length of tarsus, without denticles. Middle and hind legs similar to foreleg. Abdomen (Figs 3 A – C, 5 C – G). Coloration light yellow with tergum IV – X with an anterolateral mark, II – VIII with a medial mark, VII – VIII with an anteromedial mark; sterna light yellow. Terga creased with micropores; posterior margin of tergum IV with regular, triangular and pointed spines (Fig. 5 C). Gills (Fig. 5 D) with rounded apex, longer than next segment, with one medial trachea pigmented. Paraproct (Fig. 5 E) with eight marginal spines, posterolateral extension without spines. Cerci (Fig. 5 F) with lateral spines on every segments, longer on every 2 nd segment. Paracercus (Fig. 5 G) without spines. Imagoes: Unknown.	en	De Lima, Cláudia R. T., Massariol, Fabiana Criste, Cruz, Paulovilela, Hamada, Neusa (2022): Two new species of small minnow mayfly (Ephemeroptera: Baetidae) from a mine-tailing dam disaster area in Minas Gerais, Brazil. Zootaxa 5196 (2): 265-279, DOI: https://doi.org/10.11646/zootaxa.5196.2.7
03BD87ED6626893AFF233E85FD957172.taxon	etymology	Etymology. In the native South American language Tupi-guarani, irai means “ honey water ”, in allusion to the name of the type locality (Doce in Portuguese means “ sweet ”); the specific epithet should be considered a noun in apposition.	en	De Lima, Cláudia R. T., Massariol, Fabiana Criste, Cruz, Paulovilela, Hamada, Neusa (2022): Two new species of small minnow mayfly (Ephemeroptera: Baetidae) from a mine-tailing dam disaster area in Minas Gerais, Brazil. Zootaxa 5196 (2): 265-279, DOI: https://doi.org/10.11646/zootaxa.5196.2.7
03BD87ED6626893AFF233E85FD957172.taxon	diagnosis	Diagnosis. Larva: 1) labrum rectangular, distal medial margin with 3 minute, blunt and spatulate setae (Fig. 4 A); 2) maxillary palp longer than 2.3 × length of galea-lacinia, segment I 1.2 × length of galea-lacinia (Fig. 4 F); 3) glossa with parallel margins, apex with concave inner margin (Fig. 4 G); 4) inner distal protuberance of segment II rounded and expanded (Fig. 4 G); 5) segment III triangular (Fig. 4 G); 6) patella-tibial suture present (Fig. 5 A); 7) claws 1.0 – 1.2 × length of tarsus (Fig. 5 A); 7) paraproct without spines in posterolateral extension (Fig. 5 E).	en	De Lima, Cláudia R. T., Massariol, Fabiana Criste, Cruz, Paulovilela, Hamada, Neusa (2022): Two new species of small minnow mayfly (Ephemeroptera: Baetidae) from a mine-tailing dam disaster area in Minas Gerais, Brazil. Zootaxa 5196 (2): 265-279, DOI: https://doi.org/10.11646/zootaxa.5196.2.7
03BD87ED6626893AFF233E85FD957172.taxon	discussion	Comments. Apobaetis irai sp. nov. is very similar to the species recently described for Rondônia, northern of Brazil, A. biancae Cruz, Boldrini & Hamada and A. jacobusi Cruz, Boldrini & Hamada (South America), sharing almost all the diagnostic features described in Cruz et al. (2020), can also be confused with species A. lakota McCafferty of North America (McCafferty 2000), the four species have rounded and expanded medial projection of segment II and triangular segment III of the labial palp. The new species can be distinguished from A. lakota by the hypopharynx, with lingua subquandrangular in A. irai sp. nov. with tuft of setae at the apex, while A. lakota has lingua subcircular with a median lobe, without a tuft of setae; A. irai sp. nov. has glossae with concave inner margins at apex, inner margin without setae, and subequal in length to paraglossa; in A. lakota the glossa narrows slightly in the distal portion, has a rounded apex, with setae on inner margin, and longer than paraglossa. The A. irai sp. nov. can be distinguished from A. jacobusi and A. biancae by the setae in the distal middle area of the dorsal surface of the labrum, which are three, minute, blunt and spatulate setae in A. irai sp. nov., four, strong and pointed in A. biancae, while A. jacobusi has two protuberances and a row of thin and long setae. Apobaetis irai sp. nov. has glossa subequal in length to the paraglossa, while in A. jacobusi and A. biancae the glossa is longer than paraglossa; A. irai sp. nov. differs from A. jacobusi and A. biancae by the size of the claws, with 1.0 – 1.2 × the length of tarsus in A. irai sp. nov., in A. biancae the claw is 1.4 × the length of tarsus and in A. jacobusi the claw is subequal to the tarsus; A. irai sp. nov. has no spines on the paracercus, A. jacobusi and A. biancae have lateral spines on all segments of the paracercus.	en	De Lima, Cláudia R. T., Massariol, Fabiana Criste, Cruz, Paulovilela, Hamada, Neusa (2022): Two new species of small minnow mayfly (Ephemeroptera: Baetidae) from a mine-tailing dam disaster area in Minas Gerais, Brazil. Zootaxa 5196 (2): 265-279, DOI: https://doi.org/10.11646/zootaxa.5196.2.7
03BD87ED66228931FF233C35FB6575F6.taxon	description	(Figures 6 A – G; 7 A – D; 8 A – F)	en	De Lima, Cláudia R. T., Massariol, Fabiana Criste, Cruz, Paulovilela, Hamada, Neusa (2022): Two new species of small minnow mayfly (Ephemeroptera: Baetidae) from a mine-tailing dam disaster area in Minas Gerais, Brazil. Zootaxa 5196 (2): 265-279, DOI: https://doi.org/10.11646/zootaxa.5196.2.7
03BD87ED66228931FF233C35FB6575F6.taxon	materials_examined	Material examined. Holotype. Larva (on slide), BRAZIL, Minas Gerais State, Resplendor, 41 º 21 ′ 35 ″ W, 19 º 13 ′ 57 ″ S, 28. II. 2019, 148 m. a. s. l., coll. Bramuth A. C., Massariol, F. C., INPA. Paratypes: Larva (on slide), same data as holotype, INPA; 2 larvae (in alcohol), same data as holotype, INPA.	en	De Lima, Cláudia R. T., Massariol, Fabiana Criste, Cruz, Paulovilela, Hamada, Neusa (2022): Two new species of small minnow mayfly (Ephemeroptera: Baetidae) from a mine-tailing dam disaster area in Minas Gerais, Brazil. Zootaxa 5196 (2): 265-279, DOI: https://doi.org/10.11646/zootaxa.5196.2.7
03BD87ED66228931FF233C35FB6575F6.taxon	description	Description. Larva. Body length 3.0 – 4.0 mm. Coloration of light yellow, with light brown mark over terga VI. Head. Antenna: flagellum with minute spines and setae on apex of each flagellomere. Labrum (Fig. 6 A). Rectangular, length about 0.6 × maximum width; distal margin with medial emargination, one row of robust, eventually pectinated, setae from lateral to middle; one row of thin bifid setae on distal margin not reaching distolateral margin; dorsal surface with many thin setae near distal margin. Left mandible (Fig. 6 B): incisors partially cleft in two sets (fused at middle length); outer and inner set of incisors respectively with 4 + 2 denticles, outer incisor with spine-like process; prostheca robust and apically pectinate; margin between prostheca and mola straight; tuft of spine-like setae at base of mola absent; subtriangular process wide and pointed; denticles of mola constricted; mola with one large denticle; outer margin convex. Right mandible (Fig. 6 C): incisors cleft in two sets; outer and inner set of incisors respectively with 3 + 2 denticles, outer incisor with one spine-like process; prostheca stout, bifurcated at middle; margin between prostheca and mola straight; tuft of spine-like setae at base of mola present; denticles of mola not constricted; apex of mola with one simple setae; process of mola triangular; outer margin convex. Maxilla (Fig. 6 D). Maxillary palp 2.0 × length of galea-lacinia; segment II 1.0 × length of segment I, apex with robust apical lobe; ventral canine expanded, not laterally folded over canines (see Fig. 1 E in Cruz et al. 2022); two sets of distal setae of inner-ventral, one row clavate and one pectinate; base of maxilla broken. Hypopharynx (Fig. 6 E): lingua 1.2 × longer than superlingua, rounded without distomedial projection or tuft of setae and lateral simple setae; superlingua with rounded outer margin and with short, thin, simple setae scattered over distal margin. Labium (Figs 6 F – G): glossa slightly broad at base, with parallel margins, distal margin slightly rounded with inner part oblique, with one stout blunt setae, shorter than paraglossa; inner margin with one short spine-like setae on half; ventral surface covered by thin setae; dorsal surface with inner arc close to inner margin, outer arc not sinuous, far from distal margin. Paraglossa curved inward; apex almost straight, with two rows of robust and long spine-like setae; outer margin with 3 long setae; dorsal surface with three longitudinal rows of setae, first row near inner margin longer than half of length, with long robust setae; second with half of length of the inner row, with long robust setae; and third near to outer-distal margin, with long setae; ventral surface with one row of 4 setae near to inner margin. Labial palp with segment I 1.0 × length of segments II and III combined; inner distal protuberance of segment II rounded, covered with thin, long simple setae; segment III narrow and conical, covered by thin simple setae, dorsal surface with robust spine-like setae. Thorax. Foreleg (Figs 7 A – B): femur length about 2.8 × maximum width; dorsal margin with one row of long and robust setae reaching apex; ventral margin with few setae at base; anterior surface with one medial row of elongate setae, one row of long spine-like setae near ventral margin not reaching apex; posterior surface with one medial row of long spine-like setae, and one row of long spine-like setae near ventral margin reaching apex. Tibia dorsally bare; ventral margin with one row of long spine-like setae increasing in length to apex; patella-tibial suture absent. Tarsus: ventral margin with one row of spine-like setae. Claws 0.5 × length of tarsus, with two rows of conical denticles not reaching apex. Middle and hind legs (Figs 7 C – D): femur anterior surface with one row of spine-like setae near dorsal margin, one row of long spine-like setae near ventral margin, and one medial row of long spine-like setae; posterior surface with one row of long spine-like setae near dorsal margin reaching apex, and one row of spine-like setae near ventral margin not reaching apex. Tibia dorsally bare; ventral margin without row of small blunt setae; patella-tibial suture present. Tarsus. Ventral margin with one row of small blunt setae. Claws 0.5 × length of tarsus, with two rows of small conical denticles reaching apex. Abdomen (Figs 8 A – F). Coloration of light yellow with tergum VI with large medium brown mark; sternum IX posterior margin with transversal dark mark. Posterior margin of terga with triangular spines (Fig. 8 C). Gills oblong, longer than next segment, with one medial trachea pigmented. Paraproct (Fig. 8 D) with four wide marginal spines, posterolateral extension with spines. Cerci (Fig. 8 F) with lateral spines on every segment, longer on every longer on 2 nd segment. Paracercus (Fig. 8 E) without spines. Imagoes: Unknown.	en	De Lima, Cláudia R. T., Massariol, Fabiana Criste, Cruz, Paulovilela, Hamada, Neusa (2022): Two new species of small minnow mayfly (Ephemeroptera: Baetidae) from a mine-tailing dam disaster area in Minas Gerais, Brazil. Zootaxa 5196 (2): 265-279, DOI: https://doi.org/10.11646/zootaxa.5196.2.7
03BD87ED66228931FF233C35FB6575F6.taxon	etymology	Etymology. The Krénak people, the indigenous group who inhabits the region, named the Doce River as Watu; the specific epithet should be considered a noun in apposition.	en	De Lima, Cláudia R. T., Massariol, Fabiana Criste, Cruz, Paulovilela, Hamada, Neusa (2022): Two new species of small minnow mayfly (Ephemeroptera: Baetidae) from a mine-tailing dam disaster area in Minas Gerais, Brazil. Zootaxa 5196 (2): 265-279, DOI: https://doi.org/10.11646/zootaxa.5196.2.7
03BD87ED66228931FF233C35FB6575F6.taxon	diagnosis	Diagnosis. Larva: 1) labrum with medial emargination (Fig. 6 A); 2) labrum ventral surface with simple robust row of setae on distal margin (Fig. 6 A); 3) left mandible with incisors fused at middle length (Fig. 6 B); 4) subtriangular process of left mandible pointed (Fig. 6 B); 5) ventral canine of maxilla expanded, not laterally folded over canines (Fig. 6 D); 6) maxilla with two sets of distal setae on inner-ventral row, one clavate and one pectinate (Fig. 6 D); 7) hypopharynx without distomedial projection (Fig. 6 E); 8) glossa distal margin with inner part oblique (Fig. 6 G); 9) outer arc of setae on glossae not sinuous, far from distal margin (Fig. 6 F); 10) labial palp segment III conical (Fig. 6 F); 11) ventral margin of hind tibiae without row of setae (Fig. 7 C); 12) patella-tibial suture absent (Fig. 7 A); 13) paraproct with four spines (Fig. 8 D).	en	De Lima, Cláudia R. T., Massariol, Fabiana Criste, Cruz, Paulovilela, Hamada, Neusa (2022): Two new species of small minnow mayfly (Ephemeroptera: Baetidae) from a mine-tailing dam disaster area in Minas Gerais, Brazil. Zootaxa 5196 (2): 265-279, DOI: https://doi.org/10.11646/zootaxa.5196.2.7
03BD87ED66228931FF233C35FB6575F6.taxon	discussion	Comments. The distal shape of glossa, distal set of inner-ventral row of maxilla, the absence of row of setae on hind tibiae and hypopharynx without distomedial projection or tuft of setae are unique characteristics from Rivudiva watu sp. nov., distinguishing it from all other species of the genus. Rivudiva watu sp. nov., in Cruz et al. (2022) key, can be identified as R. trichobasis Lugo-Ortiz & McCafferty or R. uiara Cruz, Boldrini, De Lima & Hamada, 2022. Rivudiva watu sp. nov. can be differentiated from R. trichobasis by left mandible with pointed subtriangular process, rounded in R. trichobasis; maxillary palp segment II with small apical lobe, larger in R. trichobasis; ventral canine expanded, not laterally folded over canines (Fig. 6 D), folded in R. trichobasis (Fig. 1 E in Cruz et al. 2022); maxilla with two sets of distal setae of inner-ventral row, one clavate and one pectinate (Fig. 6 D), only clavate in R. trichobasis (Fig. 1 E in Cruz et al. 2022); hypopharynx without distomedial projection or tuft of setae, with projection and tuft of setae in R. trichobasis; glossa distal margin with inner part oblique, with one stout blunt seta, distal margin rounded in R. trichobasis; row of setae on ventral margin of hind tibiae absent, present in R. trichobasis; paraproct with four spines, nine in R. trichobasis. The same feature set presented distinguishes Rivudiva watu sp. nov. from R. uiara. Additionally, the new species can be differentiated by the segment III of labial palp, complete conical in R. watu sp. nov., apex concave in R. uiara; and outer arc of setae on glossa not sinuous, far from distal margin in R. watu sp. nov., sinuous in R. uiara.	en	De Lima, Cláudia R. T., Massariol, Fabiana Criste, Cruz, Paulovilela, Hamada, Neusa (2022): Two new species of small minnow mayfly (Ephemeroptera: Baetidae) from a mine-tailing dam disaster area in Minas Gerais, Brazil. Zootaxa 5196 (2): 265-279, DOI: https://doi.org/10.11646/zootaxa.5196.2.7
