Please look in Eschmeyer's Catalog of Fishes for authorships of sections, Families of Fishes (all), and related information.

Species in the genus Hisonotus: [ 35 ] records

aky, Epactionotus Azpelicueta [M. de las M.], Casciotta [J. R.], Almirón [A. E.] & Koerber [S.] 2004:82, Figs. 1-6 [Verhandlungen der Gesellschaft für Ichthyologie v. 4 (2004); ref. 28029] Arroyo Garibaldi, 26°38'46.1"S, 53°59'55"W, Río Uruguay basin at Misiones, Argentina. Holotype: MLP 10459 [ex AI 124]. Paratypes: AI 125 (8), MHNG 2643.39 (2). Type catalog: Ferraris 2007:236 [ref. 29155], Nadalin & López 2015:6 [ref. 34112]. •Valid as Epactionotus aky Azpelicueta, Casciotta, Almirón & Koerber 2004 -- (Ferraris 2007:236 [ref. 29155]). •Valid as Hisonotus aky (Azpelicueta, Casciotta, Almirón & Koerber 2004) -- (Carvalho & Reis 2009:26 [ref. 30193], Koerber 2011:5 [ref. 31122], Garvalho & Reis 2011:35 [ref. 31240], Koerber 2014:9 [ref. 33621], Roxo et al. 2015:137 [ref. 33763], Mirande & Koerber 2015:41 [ref. 35117], Zawadzki et al. 2016:379 [ref. 34367], Roxo et al. 2016:235 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[11] [ref. 35900]). Current status: Valid as Hisonotus aky (Azpelicueta, Casciotta, Almirón & Koerber 2004). Loricariidae: Hypoptopomatinae. Distribution: Uruguay River basin, Argentina. Habitat: freshwater.

alberti, Hisonotus Roxo [F. F.], Silva [G. S. C.], Waltz [B. T.] & Melo [J. E. G.] 2016:228, Figs. 1-3 [Zootaxa 4109 (no. 2); ref. 34426] Minas Gerais State, municipality of São Roque de Minas, ribeirão das Posses, upper rio Paraná basin, Brazil, 20°17'15"S, 46°34'53"W. Holotype: MZUSP 118845. Paratypes: ANSP, LBP, MPUJ, NUP. Type catalog: Oliveira et al. 2022:15 [ref. 39255]. •Valid as Hisonotus alberti Roxo, Silva, Waltz & Melo 2016 -- (Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[11] [ref. 35900], Azevedo-Santos et al. 2019:5 [ref. 36506] as cf. alberti). Current status: Valid as Hisonotus alberti Roxo, Silva, Waltz & Melo 2016. Loricariidae: Hypoptopomatinae. Distribution: South America: upper rio Paraná basin (Minas Gerais, Brazil). Habitat: freshwater.

armatus, Hisonotus Carvalho [T. P.], Lehmann A. [P.], Pereira [E. H. L.] & Reis [R. E.] 2008:510, Figs. 1-3 [Copeia 2008 (no. 3); ref. 29799] Pedro Osório, Arroio Arambaré, about 5 kilometers south of Vila Basílio, on road to Pedro Osório, 31°54'34"S, 53°01'39"W, Rio Grande do Sul, Brazil. Holotype: MCP 41323. Paratypes: ANSP 187116 (5); MCP 25138 (12, 3c&s), 34776 (31), 37682 (17, 4 c&s); MZUSP 93884 (5). Plus non-type material. •Valid as Hisonotus armatus Carvalho, Lehmann A., Pereira & Reis 2008 -- (Garvalho & Reis 2011:23 [ref. 31240], Koerber & Litz 2014:4 [ref. 34967], Roxo et al. 2015:137 [ref. 33763], Zawadzki et al. 2016:379 [ref. 34367], Roxo et al. 2016:235 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Koerber & Litz 2016:5 [ref. 35098], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Dias et al. 2018:583 [ref. 36235], Koerber et al. 2020:6 [ref. 37480], Koerber et al. 2021:7 [ref. 38894], Giora & Wingert 2023:45 [ref. 41026], Koerber et al. 2023:7 [ref. 40355], Loureiro et al. 2023:118 [ref. 40506]). Current status: Valid as Hisonotus armatus Carvalho, Lehmann A., Pereira & Reis 2008. Loricariidae: Hypoptopomatinae. Distribution: South America: Laguna dos Patos system (Brazil and Uruguay). Habitat: freshwater.

bocaiuva, Hisonotus Roxo [F. F.], Silva [G. S. C.], Oliveira [C.] & Zawadzki [C. H.] 2013:320, Figs. 1-2 [Ichthyological Exploration of Freshwaters v. 23 (no. 4) (for 2012); ref. 32527] Bocaiúva, corregó Cachoeria, Rio Jequitaí drainage, Rio São Francisco basin, 17°08'55"S, 43°49'32"W, Minas Gerais State, Brazil. Holotype: MZUSP 112204. Paratypes: DZSJRP 16461 (3); LIB 9817 (9,4c&s); MNRJ 40368 (2); NUP 12331 (4). Type catalog: Andrade et al. 2017:444 [ref. 35588], Oliveira et al. 2022:15 [ref. 39255]. •Valid as Hisonotus bocaiuva Roxo, Silva, Oliveira & Zawadzki 2013 -- (Roxo et al. 2015:137 [ref. 33763], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:235 [ref. 34426], Roxo et al. 2017:267 [ref. 35139], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2017:351 [ref. 35310], Roxo et al. 2018:[12] [ref. 35900], Dias et al. 2018:583 [ref. 36235]). Current status: Valid as Hisonotus bocaiuva Roxo, Silva, Oliveira & Zawadzki 2013. Loricariidae: Hypoptopomatinae. Distribution: South America: Rio São Francisco basin, Bocaiúva (Minas Gerais, Brazil). Habitat: freshwater.

brunneus, Hisonotus Carvalho [T. P.] & Reis [R. E.] 2011:38, Figs. 4g, 8g, 40-41 [Neotropical Ichthyology v. 9 (no. 1); ref. 31240] Cruz Alta, rio Passo Novo, on road from Cruz Alta to Ibirubá, rio Jacuí drainage, 28°38'43"S, 53°33'35"W, Rio Grande do Sul, Brazil. Holotype: MCP 44516. Paratypes: ANSP 188705 (4); MCP 22701 (30, 3 c&s), 41072 (13); MZUSP 104947 (4). •Valid as Hisonotus brunneus Carvalho & Reis 2011 -- (Roxo et al. 2015:137 [ref. 33763], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:235 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900]). Current status: Valid as Hisonotus brunneus Carvalho & Reis 2011. Loricariidae: Hypoptopomatinae. Distribution: Upper rio Jacuí basin, Laguna dos Patos system, Brazil. Habitat: freshwater.

candombe, Hisonotus Casciotta [J. R.], Azpelicueta [M. de las M.], Almirón [A. E.] & Litz [T.] 2006:147, Figs. 1-2 [Spixiana (München) v. 29 (no. 2); ref. 28758] Arroyo Palomas, 31°04.71'S, 57°37.44'W, río Uruguay basin, Departamento Salto, Uruguay. Holotype: ZVC-P 5595. Paratypes: AI 187 (4); MHNG 2662.86 (2); MLP 10462 [ex Al 164] (1); ZSM 32062, not 33062 [ex CTL 539] (3). Type catalog: Neumann 2011:267 [ref. 31652], Nadalin & López 2015:7 [ref. 34112], Loureiro et al. 2016:414 [ref. 35150]. •Valid as Hisonotus candombe Casciotta, Azpelicueta, Almirón & Litz 2006 -- (Azpelicueta & Almirón 2007:596 [ref. 29353], Ferraris 2007:440 [ref. 29155]). •Synonym of Hisonotus ringueleti Aquino, Schaefer & Miquelarena 2001 -- (Carvalho & Reis 2009:31 [ref. 30193], Litz & Koerber 2014:24 [ref. 33622]). Current status: Synonym of Hisonotus ringueleti Aquino, Schaefer & Miquelarena 2001. Loricariidae: Hypoptopomatinae. Distribution: Lower Uruguay River basin, Uruguay. Habitat: freshwater.

carreiro, Hisonotus Carvalho [T. P.] & Reis [R. E.] 2011:27, Figs. 4d, 8d, 28, 29 [Neotropical Ichthyology v. 9 (no. 1); ref. 31240] Serafina Corrêa, rio Carreiro, downstream of Carreiro bathing spot, 28°42'10"S, 51°50'57"W, Rio Grande do Sul, Brazil. Holotype: MCP 44515. Paratypes: ANSP 188702 (3); MCN 16361 (3); MCP 40495 (4, 2 c&s), 40943 (3), 41548 (1); MZUSP 104944 (3); UFRGS 6961 (7). Name is a noun in apposition. •Valid as Hisonotus carreiro Carvalho & Reis 2011 -- (Roxo et al. 2015:137 [ref. 33763], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:235 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900]). Current status: Valid as Hisonotus carreiro Carvalho & Reis 2011. Loricariidae: Hypoptopomatinae. Distribution: Rio Carreiro drainage, tributary of the rio Taquari, rio Jacuí basin, Laguna dos Patos system, Brazil. Habitat: freshwater.

charrua, Hisonotus Almirón [A. E.], Azpelicueta [M. de las M.], Casciotta [J. R.] & Litz [T.] 2006:87 [Revue Suisse de Zoologie v. 113 (no. 1); ref. 28713] Ríp Uruguay basin, Cañada de Los Peña, 31°39.09'S, 56°12.32'W, Dept. Tacuarembó, Uruguay. Holotype: ZVC-P 5639. Paratypes: Al, MHNG, MTD, ZVC. Type catalog: Nadalin & López 2015:7 [ref. 34112], Loureiro et al. 2016:414 [ref. 35150]. •Valid as Hisonotus charrua Almirón, Azpelicueta, Casciotta & Litz 2006 -- (Azpelicueta & Almirón 2007:596 [ref. 29353], Ferraris 2007:440 [ref. 29155], Chiachio et al. 2008:610 [ref. 30127], Carvalho & Reis 2009:35 [ref. 30193], Koerber 2011:6 [ref. 31122], Garvalho & Reis 2011:21 [ref. 31240], Koerber 2014:9 [ref. 33621], Litz & Koerber 2014:24 [ref. 33622], Roxo et al. 2015:137 [ref. 33763], Mirande & Koerber 2015:41 [ref. 35117], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:235 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Nión et al. 2016:31 [ref. 35565] with authors as Almirón, Casciotta, Azpelicueta & Litz, Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Loureiro et al. 2023:118 [ref. 40506]). Current status: Valid as Hisonotus charrua Almirón, Azpelicueta, Casciotta & Litz 2006. Loricariidae: Hypoptopomatinae. Distribution: South America: La Plata River and Uruguay River basins (Argentina and Uruguay). Habitat: freshwater.

depressicauda, Otocinclus Miranda Ribeiro [A. de] 1918:635 [7] [Revista do Museu Paulista v. 10; ref. 3725] Sorocaba, Rio Paraná, São Paulo State, Brazil. Lectotype: MZUSP [ex DZSASP] 1004. Paralectotypes: (10) MNRJ 1931 (4), MZUSP [ex DZSASP] 5381-5384 (4). Type catalog: Miranda Ribeiro 1955:400 [ref. 12732], Britski 1969:208-209 [ref. 12401], Ferraris 2007:248 [ref. 29155] On p. 7 of separate. Lectotype selected by Britski 1969:208 [ref. 12401]. •Valid as Otocinclus depressicauda Miranda Ribeiro 1918 -- (Isbrücker 1980:82 [ref. 2303], Burgess 1989:438 [ref. 12860]). •In Microlepidogaster -- (Schaefer 1997:8 [ref. 23213]). •Valid as Hisonotus depressicauda (Miranda Ribeiro 1918) -- (Isbrücker 2001:28, 30 [ref. 25653], Aquino et al. 2001:9 [ref. 25673], Isbrücker 2002:17 [ref. 27178], Britski & Garavello 2003:593 [ref. 27131], Schaefer in Reis et al. 2003:322 [ref. 27061], Almirón et al. 2006:92 [ref. 28713], Azpelicueta & Almirón 2007:596 [ref. 29353], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:248 [ref. 29155], Roxo et al. 2015:137 [ref. 33763], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:235 [ref. 34426], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Dias et al. 2018:583 [ref. 36235], Azevedo-Santos et al. 2020:5 [ref. 39606], Reis et al. 2020:469 [ref. 38364] as cf. depressicauda). Current status: Valid as Hisonotus depressicauda (Miranda Ribeiro 1918). Loricariidae: Hypoptopomatinae. Distribution: South America: Tietê River basin, upper Paraná River basin (Brazil). Habitat: freshwater.

depressinotus, Microlepidogaster Miranda Ribeiro [A. de] 1918:633 [5] [Revista do Museu Paulista v. 10; ref. 3725] Piracicaba, São Paulo State, Brazil. Holotype (unique): MZUSP [ex DZSASP] 2156. Type catalog: Britski 1969:208 [ref. 12401], Ferraris 2007:248 [ref. 29155]. On p. 5 of separate. •Valid as Otocinclus depressinotus (Miranda Ribeiro 1918) -- (Isbrücker 1980:82 [ref. 2303]). •Valid as Microlepidogaster depressinotus Miranda Ribeiro 1918 -- (Burgess 1989:439 [ref. 12860]). •Valid as Hisonotus depressinotus (Miranda Ribeiro 1918) -- (Isbrücker 2001:28, 30 [ref. 25653], Aquino et al. 2001:9 [ref. 25673], Isbrücker 2002:17 [ref. 27178], Britski & Garavello 2003:593 [ref. 27131], Schaefer in Reis et al. 2003:322 [ref. 27061], Almirón & Azpelicueta 2006:92 [ref. 28713], Azpelicueta & Almirón 2007:596 [ref. 29353], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:248 [ref. 29155], Calegari et al. 2017:243 [ref. 35203]). •Synonym of Hisonotus paulinus (Regan 1908) -- (H. A. Britski pers. comm.). Current status: Synonym of Hisonotus paulinus (Regan 1908). Loricariidae: Hypoptopomatinae. Habitat: freshwater.

devidei, Hisonotus Roxo [F. F.], Silva [G. S. C.] & Melo [B. F.] 2018:[2], Figs. 1, 2a, 3-4 [Journal of Fish Biology v. 92 (no. 6); ref. 35900] Córrego Catolé, Rio Pandeiros drainage, Rio São Francisco basin, Bonito de Minas, Minas Gerais, Brazil, 15°17'22"S, 44°49'20"W. Holotype: MZUSP 123294. Paratypes: ANSP, LBP, MCNIP, MZUSP, NUP. Type catalog: Oliveira et al. 2022:15 [ref. 39255]. •Valid as Hisonotus devidei Roxo, Silva & Melo 2018 -- (Dias et al. 2018:583 [ref. 36235]). Current status: Valid as Hisonotus devidei Roxo, Silva & Melo 2018. Loricariidae: Hypoptopomatinae. Distribution: South America: Rio Pandeiros drainage, Rio São Francisco basin (Minas Gerais, Brazil). Habitat: freshwater.

francirochai, Otocinclus Ihering [R. von] 1928:2, Fig. 1 [Boletim Biologico, Trabalho do Laboratorio de Parasitologia da Facultade de Medicina de São Paulo v. 11 (no. 42); ref. 13840] Creeks by Pirangy, head waters of Rio Turvo, Brazil. Lectotype: MZUSP 3258 [ex DZSASP]. Paralectotypes: MZUSP [ex DZSASP] 5387-5397 (11). Type catalog: Britski 1969:209 [ref. 12401], Ferraris 2007:248 [ref. 29155]. Lectotype selected by Britski 1969:209 [ref. 12401]. •Valid as Otocinclus francirochai Ihering 1928 -- (Isbrücker 1980:82 [ref. 2303], Burgess 1989:438 [ref. 12860]). •In Microlepidogaster -- (Schaefer 1997:8 [ref. 23213]). •Valid as Microlepidogaster francirochai (Ihering 1928) -- (Castro & Casatti 1997:342 [ref. 23333]). •Valid as Hisonotus francirochai (Ihering 1928) -- (Isbrücker 2001:28, 30 [ref. 25653], Isbrücker 2002:17 [ref. 27178], Britski & Garavello 2003:593 [ref. 27131], Schaefer in Reis et al. 2003:322 [ref. 27061], Almirón & Azpelicueta 2006:92 [ref. 28713], Azpelicueta & Almirón 2007:596 [ref. 29353], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:248 [ref. 29155], Chiachio et al. 2008:610 [ref. 30127], Garvalho & Reis 2011:27 [ref. 31240], Roxo et al. 2015:137 [ref. 33763], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:235 [ref. 34426], Roxo et al. 2017:267 [ref. 35139], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Dias et al. 2018:583 [ref. 36235], Reis et al. 2020:469 [ref. 38364]). Current status: Valid as Hisonotus francirochai (Ihering 1928). Loricariidae: Hypoptopomatinae. Distribution: South America: Grande River basin, upper Paraná River basin (Brazil). Habitat: freshwater.

heterogaster, Hisonotus Carvalho [T. P.] & Reis [R. E.] 2011:40, Figs. 4h, 8h, 42-43 [Neotropical Ichthyology v. 9 (no. 1); ref. 31240] Júlio de Castilhos, arroio Felicio, on road from Nova Palma to Júlio de Castilhos, 29°19'04"S, 53°37'54"W, Rio Grande do Sul, Brazil. Holotype: MCP 44514. Paratypes: ANSP 188706 (3); MCP 26802 (1)41073 (7, 2 c&s); MZUSP 14948 (3). •Valid as Hisonotus heterogaster Carvalho & Reis 2011 -- (Roxo et al. 2015:137 [ref. 33763], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:235 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900]). Current status: Valid as Hisonotus heterogaster Carvalho & Reis 2011. Loricariidae: Hypoptopomatinae. Distribution: Rio Jacuí basin, Brazil. Habitat: freshwater.

hungy, Hisonotus Azpelicueta [M. de las M.], Almirón [A. E.], Casciotta [J. R.] & Koerber [S.] 2007:592, Figs. 1, 3 [Revue Suisse de Zoologie v. 114 (no. 3); ref. 29353] Arroyo Tiria, affluent of arroyo Urugua-í, 26°01'S, 55°22'W, Río Paraná basin, Province Misiones, Argentina. Holotype: MACN-ict 8860. Paratypes: MHNG 2664.79 (2), MLP 10466 [ex AI 189] (5, 1 c&s), ZFMK 39472-75 (4), ZSM 33313 (2). Type catalog: Neumann 2011:267 [ref. 31652], Nadalin & López 2015:7 [ref. 34112]. •Valid as Hisonotus hungy Azpelicueta, Almirón, Casciotta & Koerber 2007 -- (Koerber 2011:6 [ref. 31122], Koerber 2014:9 [ref. 33621], Mirande & Koerber 2015:41 [ref. 35117], Calegari et al. 2017:243 [ref. 35203] as hungi). Current status: Valid as Hisonotus hungy Azpelicueta, Almirón, Casciotta & Koerber 2007. Loricariidae: Hypoptopomatinae. Distribution: Arroyo Tirica, arroyo Urugua-í basin, Misiones, Argentina. Habitat: freshwater.

iota, Hisonotus Carvalho [T. P.] & Reis [R. E.] 2009:4, Figs. 2, 3A, 4, 5A, 6A, 7 [Zootaxa No. 2113; ref. 30193] Coronel de Freitas, rio Chapecó at vila São Miguel on road from Coronel de Freitas to Quilombo, rio Uruguay basin, 26°51'26"S, 52°44'29"W, Santa Catarina State, Brazil. Holotype: MCP 42575. Paratypes: ANSP 187472 (4), MCP 40029 (18 + 3 c&s). •Valid as Hisonotus iota Carvalho & Reis 2009 -- (Garvalho & Reis 2011:27 [ref. 31240], Roxo et al. 2015:138 [ref. 33763], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Dias et al. 2018:583 [ref. 36235]). Current status: Valid as Hisonotus iota Carvalho & Reis 2009. Loricariidae: Hypoptopomatinae. Distribution: Rio Chapecó, a tributary of the upper rio Uruguay basin: Brazil. Habitat: freshwater.

laevior, Hisonotus Cope [E. D.] 1894:95, Pl. 8 [7] (figs. 12, 12a-b) [Proceedings of the American Philosophical Society v. 33; ref. 965] Rio Jacuhy [Jacuí] , Rio Grande do Sul, Brazil. Holotype (unique): ANSP 21563. Type catalog: Böhlke 1984:123 [ref. 13621], Ferraris 2007:248 [ref. 29155]. •Valid as Otocinclus laevior (Cope 1894) -- (Isbrücker 1980:83 [ref. 2303], Burgess 1989:438 [ref. 12860]). •Valid as Microlepidogaster laevior (Cope 1894) -- (Malabarba 1989:149 [ref. 14217]). •Valid as Hisonotus laevior Cope 1894 -- (Isbrücker 2001:28 [ref. 25653], Aquino et al. 2001:9 [ref. 25673], Isbrücker 2002:17 [ref. 27178], Schaefer in Reis et al. 2003:322 [ref. 27061], Almirón & Azpelicueta 2006:93 [ref. 28713], Casciotta et al. 2006:150 [ref. 28758], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:248 [ref. 29155], Carvalho et al. 2008:515 [ref. 29799], Garvalho & Reis 2011:12 [ref. 31240], Roxo et al. 2015:138 [ref. 33763], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Giora & Wingert 2023:45 [ref. 41026]). Current status: Valid as Hisonotus laevior Cope 1894. Loricariidae: Hypoptopomatinae. Distribution: Jacuí River basin, Brazil. Habitat: freshwater.

leptochilus, Hisonotus Cope [E. D.] 1894:96, Pl. 8 [7] (figs. 11 a-b) [Proceedings of the American Philosophical Society v. 33; ref. 965] Rio Jacuhy [Jacuí], Rio Grande do Sul, Brazil. Holotype (unique): ANSP 21564. Type catalog: Böhlke 1984:123 [ref. 13621], Ferraris 2007:248 [ref. 29155]. Intended Pl. 7 was reversed with Pl. 8. Garvalho & Reis 2011:12 [ref. 31240] serve as first revisers, selecting laevior over leptochilus; both published in the same publication. •Valid as Otocinclus leptochilus (Cope 1894) -- (Isbrücker 1980:83 [ref. 2303]). •Valid as Microlepidogaster leptochilus (Cope 1894) -- (Malabarba 1989:149 [ref. 14217], Burgess 1989:439 [ref. 12860]). •Valid as Hisonotus leptochilus Cope 1894 -- (Isbrücker 2001:28 [ref. 25653], Isbrücker 2002:17 [ref. 27178], Schaefer in Reis et al. 2003:322 [ref. 27061], Almirón & Azpelicueta 2006:93 [ref. 28713], Casciotta et al. 2006:150 [ref. 28758], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:248 [ref. 29155], Carvalho et al. 2008:515 [ref. 29799]). •Snonym of Hisonotus laevior Cope 1894 -- (Garvalho & Reis 2011:12 [ref. 31240]). Current status: Synonym of Hisonotus laevior Cope 1894. Loricariidae: Hypoptopomatinae. Habitat: freshwater.

leucofrenatus, Otocinclus Miranda Ribeiro [A. de] 1908:[2] [Kosmos, Rio de Janeiro [Rev. Art. Sci. Litt.] v. 5 (no. 2) (for 1907); ref. 3715] Rio das Pedras of Rio Ribeira, Brazil. No types known. Type catalog: Ferraris 2007:248 [ref. 29155]. •Valid as Otocinclus leucofrenatus Miranda Ribeiro 1908 -- (Isbrücker 1980:83 [ref. 2303], Burgess 1989:438 [ref. 12860]). •In Microlepidogaster -- (Schaefer 1997:8 [ref. 23213]). •Valid as Hisonotus leucofrenatus (Miranda Ribeiro 1908) -- (Isbrücker 2001:28, 30 [ref. 25653], Aquino et al. 2001:9 [ref. 25673], Isbrücker 2002:17 [ref. 27178], Schaefer in Reis et al. 2003:323 [ref. 27061], Almirón & Azpelicueta 2006:93 [ref. 28713], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:248 [ref. 29155], Chiachio et al. 2008:610 [ref. 30127], Garvalho & Reis 2011:18 [ref. 31240], Roxo et al. 2015:138 [ref. 33763], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Dias et al. 2018:583 [ref. 36235], Giora & Wingert 2023:45 [ref. 41026]). Current status: Valid as Hisonotus leucofrenatus (Miranda Ribeiro 1908). Loricariidae: Hypoptopomatinae. Distribution: Laguna dos Patos drainage, rio Tramandaí system and Brazilian Atlantic coastal drainages, Brazil. Habitat: freshwater.

leucophrys, Hisonotus Carvalho [T. P.] & Reis [R. E.] 2009:12, Figs. 5B, 6B, 9 [Zootaxa No. 2113; ref. 30193] Rio Ariranhas on bridge of highway SC-466, rio Uruguay basin, 27°04'17"S. 52°20'34"W, Xavantina, Santa Catarina, Brazil. Holotype: MCP 42576. Paratypes: ANSP 187473 (2); MCN 12024 (1), 12553 (1), 12741 (2); MCP 41351 (1), 42354 (3 + 2 c&s), •Valid as Hisonotus leucophrys Carvalho & Reis 2009 -- (Garvalho & Reis 2011:18 [ref. 31240], Roxo et al. 2015:138 [ref. 33763], Zawadzki et al. 2016:380 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:243 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900]). Current status: Valid as Hisonotus leucophrys Carvalho & Reis 2009. Loricariidae: Hypoptopomatinae. Distribution: Upper rio Uruguay basin, Brazil. Habitat: freshwater.

maculipinnis, Otocinclus Regan [C. T.] 1912:668, Pl. 77 (fig. 3) [Proceedings of the Zoological Society of London 1912 (pt 3) (art. 36); ref. 14862] Rio de la Plata, South America. Syntypes: BMNH 1909.4.2.19-22 (4). Type catalog: Ferraris 2007:248 [ref. 29155]. •Valid as Otocinclus maculipinnis Regan 1912 -- (Isbrücker 1980:84 [ref. 2303], Burgess 1989:438 [ref. 12860], Schaefer 1991:6 [ref. 18926]). •In Microlepidogaster -- (Schaefer 1997:8 [ref. 23213]). •Valid as Microlepidogaster maculipinnis (Regan 1912) -- (López et al. 2003:44 [ref. 27366], Menni 2004:79 [ref. 28131]). •Valid as Hisonotus maculipinnis (Regan 1912) -- (Isbrücker 2001:28, 30 [ref. 25653], Aquino et al. 2001:9 [ref. 25673], Isbrücker 2002:17 [ref. 27178], Schaefer in Reis et al. 2003:323 [ref. 27061], Almirón & Azpelicueta 2006:87 [ref. 28713], Casciotta et al. 2006:150 [ref. 28758], Azpelicueta & Almirón 2007:596 [ref. 29353], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:248 [ref. 29155], Garvalho & Reis 2011:9 [ref. 31240], Litz & Koerber 2014:24 [ref. 33622], Mirande & Koerber 2015:41 [ref. 35117], Nión et al. 2016:31 [ref. 35565], Calegari et al. 2017:244 [ref. 35203], Koerber et al. 2017:58 [ref. 35267]). Current status: Valid as Hisonotus maculipinnis (Regan 1912). Loricariidae: Hypoptopomatinae. Distribution: Lower Paraná basin, Paraguay and La Plata River basins: Argentina, Paraguay and Uruguay. Habitat: freshwater.

megaloplax, Hisonotus Carvalho [T. P.] & Reis [R. E.] 2009:18, Figs. 5C, 6C, 11, 12 [Zootaxa No. 2113; ref. 30193] Arroio Caraguatá on secondary road to highway BR-153 between Passo Fundo and Ipiranga, 28°07'55"S, 52°20'56"W, Coxilha, Rio Grande do Sul, Brazil. Holotype: MCP 42577. Paratypes: ANSP 187474 (4); MCP 31765 (2), 31779 (9 + 3 c&s), 41352 (6) •Valid as Hisonotus megaloplax Carvalho & Reis 2009 -- (Garvalho & Reis 2011:35 [ref. 31240], Roxo et al. 2015:138 [ref. 33763], Zawadzki et al. 2016:381 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:244 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Dias et al. 2018:583 [ref. 36235]). Current status: Valid as Hisonotus megaloplax Carvalho & Reis 2009. Loricariidae: Hypoptopomatinae. Distribution: Rio Passo Fundo drainage, upper rio Uruguay basin, Brazil. Habitat: freshwater.

minutus, Hisonotus Eigenmann [C. H.] & Eigenmann [R. S.] 1890:391 [Occasional Papers California Academy of Sciences No. 1; ref. 12251] Apparently a lapsus under Hisonotus notatus for notatus as, "Dr. Steindachner probably includes minutus with his maculicauda. We here wish to restrict the name maculicauda to the species figured by Dr. Steindachner." •In the synonymy of Otocinclus notatus (Eigenmann & Eigenmann 1890) -- (Isbrücker 1980:84 [ref. 2303]). •In the synonymy of Hisonotus notatus Eigenmann & Eigenmann 1890 -- (Isbrücker 2001:28 [ref. 25653], Isbrücker 2002:16-17 [ref. 27178], Schaefer in Reis et al. 2003:323 [ref. 27061]). •Unavailable name -- (Ferraris 2007:249 [ref. 29155]). Misspelling. Current status: Synonym of Hisonotus. Loricariidae: Hypoptopomatinae.

montanus, Hisonotus Carvalho [T. P.] & Reis [R. E.] 2009:22, Figs. 5D, 6D, 13, 14 [Zootaxa No. 2113; ref. 30193] Rio Rufino on highway SC-427 by the city of Rio Rufino, 27°51'36"S, 49°46'55"W, Rio Canoas drainage, rio Uruguay basin, Santa Catarina, Brazil. Holotype: MCP 42578. Paratypes: ANSP 187475 (4); UFRGS 9597 (3); MCP 22369 (1)41459 (16 + 3 c&s). •Valid as Hisonotus montanus Carvalho & Reis 2009 -- (Garvalho & Reis 2011:35 [ref. 31240], Roxo et al. 2015:138 [ref. 33763], Zawadzki et al. 2016:381 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:244 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Dias et al. 2018:583 [ref. 36235]). Current status: Valid as Hisonotus montanus Carvalho & Reis 2009. Loricariidae: Hypoptopomatinae. Distribution: Rio Canoas drainage, upper rio Uruguay basin, Brazil. Habitat: freshwater.

nigricauda, Otocinclus Boulenger [G. A.] 1891:234, Pl. 25 (fig. 3) [Proceedings of the Zoological Society of London 1891 (pt 2); ref. 17039] Rio Grande do Sul, Brazil. Syntypes: BMNH 1891.3.16.53-62 (10, now 9). Type catalog: Ferraris 2007:248 [ref. 29155]. •Valid as Otocinclus nigricauda Boulenger 1891 -- (Isbrücker 1980:84 [ref. 2303], Schaefer 1991:6 [ref. 18926]). •Valid as Microlepidogaster nigricauda (Boulenger 1891) -- (Malabarba 1989:150 [ref. 14217], Burgess 1989:439 [ref. 12860]). •Valid as Hisonotus nigricauda (Boulenger 1891) -- (Isbrücker 2001:28, 30 [ref. 25653], Aquino et al. 2001:9 [ref. 25673], Isbrücker 2002:18 [ref. 27178], Britski & Garavello 2003:592 [ref. 27131], Schaefer in Reis et al. 2003:323 [ref. 27061], Almirón & Azpelicueta 2006:93 [ref. 28713], Casciotta et al. 2006:150 [ref. 28758], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:248 [ref. 29155], Carvalho et al. 2008:515 [ref. 29799], Chiachio et al. 2008:610 [ref. 30127], Carvalho & Reis 2009:35 [ref. 30193], Koerber 2011:6 [ref. 31122], Garvalho & Reis 2011:3 [ref. 31240], Koerber 2014:9 [ref. 33621], Litz & Koerber 2014:24 [ref. 33622], Roxo et al. 2015:138 [ref. 33763], Mirande & Koerber 2015:41 [ref. 35117], Zawadzki et al. 2016:381 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Nión et al. 2016:31 [ref. 35565], Calegari et al. 2017:244 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Giora & Wingert 2023:45 [ref. 41026], Loureiro et al. 2023:118 [ref. 40506]). Current status: Valid as Hisonotus nigricauda (Boulenger 1891). Loricariidae: Hypoptopomatinae. Distribution: SouthAmerica: Paraná/Paraguay River basin, Uruguay River basin (Argentina, Brazil and Uruguay). Habitat: freshwater.

notatus, Hisonotus Eigenmann [C. H.] & Eigenmann [R. S.] 1889:41 [Proceedings of the California Academy of Sciences (Series 2) v. 2; ref. 1253] Rio de Janeiro State, Santa Cruz, rio Guandu, Santa Cruz farm - Emperor Pedro II's farm, Brazil, 22°54'40"S, 43°41'7"W. [old locality: Santa Cruz, within urban area of Rio de Janeiro, Brazil.] Lectotype: MNRJ 42969 (out of 28882). Paralectotypes: ANSP 166924 [ex MCZ 7764] (6); BMNH 1904.1.28.13-16 [ex MCZ 7764] (4); MCZ 7764 (95, now 79) Santa Cruz, not 8177 (1) Juiz de Fora; MNRJ 28882 (5). Some specimens lost. Type catalog: Ferraris 2007:248 [ref. 29155]. Lectotype selected by Martins & Langeani 2016:12 [ref. 34533]. •Valid as Otocinclus notatus (Eigenmann & Eigenmann 1889) -- (Isbrücker 1980:84 [ref. 2303], Burgess 1989:439 [ref. 12860], Schaefer 1991:6 [ref. 18926]). •In Microlepidogaster -- (Schaefer 1997:8 [ref. 23213]). •Valid as Hisonotus notatus Eigenmann & Eigenmann 1889 -- (Isbrücker 2001:28 [ref. 25653], Aquino et al. 2001:9 [ref. 25673], Isbrücker 2002:18 [ref. 27178], Britto & Moreira 2002:1064 [ref. 26512], Britski & Garavello 2003:592 [ref. 27131], Schaefer in Reis et al. 2003:323 [ref. 27061], Almirón & Azpelicueta 2006:93 [ref. 28713], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:248 [ref. 29155], Garvalho & Reis 2011:1 [ref. 31240], Rosa et al. 2014:59 [ref. 33228], Silva et al. 2014:119 [ref. 33533], Roxo et al. 2015:138 [ref. 33763], Zawadzki et al. 2016:381 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Martins & Langeani 2016:10 [ref. 34533], Roxo et al. 2017:267 [ref. 35139], Calegari et al. 2017:244 [ref. 35203], Roxo et al. 2017:351 [ref. 35310], Roxo et al. 2018:[12] [ref. 35900]). Current status: Valid as Hisonotus notatus Eigenmann & Eigenmann 1889. Loricariidae: Hypoptopomatinae. Distribution: Rio São João drainage, southeastern Brazil. Habitat: freshwater.

notopagos, Hisonotus Carvalho [T. P.] & Reis [R. E.] 2011:24, Figs. 4c, 6c, 8c, 25, 26, 27c [Neotropical Ichthyology v. 9 (no. 1); ref. 31240] Lavras do Sul, small creek tributary of arroio das Lavras on road from Lavras do Sul to Bagé, rio Camaquã drainage, 30°50'18"S, 53°55'43"W, Rio Grande do Sul, Brazil. Holotype: MCP 44517. Paratypes: many at ANSP, MCP, MZUSP, UFRGS. •Valid as Hisonotus notopagos Carvalho & Reis 2011 -- (Roxo et al. 2015:138 [ref. 33763], Zawadzki et al. 2016:381 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:244 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900]). Current status: Valid as Hisonotus notopagos Carvalho & Reis 2011. Loricariidae: Hypoptopomatinae. Distribution: Headwaters of Rio Camaquã drainage, Laguna dos Patos system, southern Brazil. Habitat: freshwater.

pachysarkos, Hisonotus Zawadzki [C. H.], Roxo [F. F.] & da Graça [W. J.] 2016:374, Figs. 1-3 [Ichthyological Exploration of Freshwaters v. 26 (no. 4); ref. 34367] Rio Barra Grande, Rio Ivaí basin, upper rio Paraná system, Paraná, Brazil, 25°04'55"S, 51°10'35"W. Holotype: MZUSP 115283. Paratypes: ANSP, LBP, MCP, MHNCI, MZUEL, MZUSP, NUP, ZMA. Type catalog: Oliveira et al. 2022:16 [ref. 39255]. •Valid as Hisonotus pachysarkos Zawadzki, Roxo & da Graça 2016 -- (Reis et al. 2020:469 [ref. 38364]). Current status: Valid as Hisonotus pachysarkos Zawadzki, Roxo & da Graça 2016. Loricariidae: Hypoptopomatinae. Distribution: South America: Rio Ivaí basin, upper rio Paraná system (Brazil). Habitat: freshwater.

paulinus, Otocinclus Regan [C. T.] 1908:799, Fig. 208 [Proceedings of the Zoological Society of London 1907 (pt 4); ref. 14333] Rio Piracicaba, São Paulo, Brazil. Holotype (unique): BMNH 1907.7.6.9. Type catalog: Ferraris 2007:249 [ref. 29155]. •Valid as Otocinclus paulinus Regan 1908 -- (Isbrücker 1980:84 [ref. 2303], Burgess 1989:439 [ref. 12860]). •In Microlepidogaster -- (Schaefer 1997:8 [ref. 23213]). •Valid as Hisonotus paulinus (Regan 1908) -- (Isbrücker 2001:28, 30 [ref. 25653], Aquino et al. 2001:8 [ref. 25673], Isbrücker 2002:18 [ref. 27178], Britski & Garavello 2003:593 [ref. 27131], Schaefer in Reis et al. 2003:323 [ref. 27061], López et al. 2003:43 [ref. 27366] as cf. paulinus, Menni 2004:79 [ref. 28131] as cf. paulinus, Almirón & Azpelicueta 2006:92 [ref. 28713], Azpelicueta & Almirón 2007:596 and Fig. 2 [ref. 29353], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:249 [ref. 29155], Martins et al. 2014:7 [ref. 33617], Zawadzki et al. 2016:381 [ref. 34367]). Current status: Valid as Hisonotus paulinus (Regan 1908). Loricariidae: Hypoptopomatinae. Distribution: Tietê River basin, upper Paraná River basin, Brazil. Habitat: freshwater.

prata, Hisonotus Carvalho [T. P.] & Reis [R. E.] 2011:30, Figs. 4e, 8e, 27b, 33-35 [Neotropical Ichthyology v. 9 (no. 1); ref. 31240] Nova Prata, rio da Prata on Passo do Despraiado, 28°38'01"S, 51°36'51"W, Rio Grande do Sul, Brazil. Holotype: MCP 44513. Paratypes: ANSP 188703 (3); MCP 22204 (12, 3 c&s), 40492 (18); MZUSP 104945 (3). The name prata is a noun in apposition. •Valid as Hisonotus prata Carvalho & Reis 2011 -- (Roxo et al. 2015:139 [ref. 33763], Zawadzki et al. 2016:381 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:244 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900]). Current status: Valid as Hisonotus prata Carvalho & Reis 2011. Loricariidae: Hypoptopomatinae. Distribution: Rio da Prata, in rio Taquari drainage, which is a tributary of the rio Jacuí basin, in Laguna dos Patos system, Brazil. Habitat: freshwater.

ringueleti, Hisonotus Aquino [A. E.], Schaefer [S. A.] & Miquelarena [A. M.] 2001:3, Fig. 1 [American Museum Novitates No. 3333; ref. 25673] Creek at kilometer 18 of route from Santana do Livramento, Brazil and Rivera, Uruguay [actually contiguous towns], Quaraí River system, Rivera state, Uruguay [actual: headwaters of Quarai drainage, Brazil of Uruguay]. Holotype: CFA-IC 10886 [ex ILPLA 886]. Paratypes: CFA-IC 10883 [ex ILPLA 883] (99); AMNH 230702 (8, 3 c&s), ANSP 177878 (4, 1 c&s), FMNH 108806 (4), MCP 26154 (4, 1 c&s), MLP 9536 (4), MZUSP 62788 (3), ULPLA 883 (95). USNM 362665 (4). Type catalog: Ferraris 2007:249 [ref. 29155], Koerber 2007:2 [ref. 29776], Miquelarena & Nadalin 2014:12 [ref. 33466], Bogan et al. 2019:18 [ref. 37088]. See Carvalho & Reis 2009:34 [ref. 30193] for comments on the type locality. •Valid as Hisonotus ringueleti Aquino, Schaefer & Miquelarena 2001 -- (Isbrücker 2001:28 [ref. 25653], Isbrücker 2002:18 [ref. 27178], Schaefer in Reis et al. 2003:323 [ref. 27061], López et al. 2003:44 [ref. 27366], Almirón & Azpelicueta 2006:87 [ref. 28713], Casciotta et al. 2006:150 [ref. 28758], Azpelicueta & Almirón 2007:596 [ref. 29353], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:249 [ref. 29155], Chiachio et al. 2008:610 [ref. 30127], Carvalho & Reis 2009:31 [ref. 30193], Garvalho & Reis 2011:35 [ref. 31240], Litz & Koerber 2014:24 [ref. 33622], Roxo et al. 2015:139 [ref. 33763], Zawadzki et al. 2016:381 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Nión et al. 2016:31 [ref. 35565], Calegari et al. 2017:244 [ref. 35203], Roxo et al. 2018:[12] [ref. 35900], Loureiro et al. 2023:118 [ref. 40506]). Current status: Valid as Hisonotus ringueleti Aquino, Schaefer & Miquelarena 2001. Loricariidae: Hypoptopomatinae. Distribution: South America: middle Uruguay River basin (Uruguay). Habitat: freshwater.

taimensis, Microlepidogaster Buckup [P. A.] 1981:22, Figs. 1-7 [Iheringia, Série Zoologia (Porto Alegre) No. 60; ref. 8629] Novo canal do Arroio Taim, Estação Ecológica do Taim, Rio Grande do Sul, Brazil. Holotype: MZUSP 14133. Paratypes: UFRGS 0279-83 (5), 0344-0378 (35), 0379-0400 (22); MAPA 0725 (1), 1012-50 (39), 1051-1070 (20), 1071-74 (4); MCN 4835-4844 (10); MZUSP 14134-14142 (9). Type catalog: Ferraris 2007:249 [ref. 29155]. •Valid as Microlepidogaster taimensis Buckup 1981 -- (Malabarba 1989:150 [ref. 14217], Burgess 1989:439 [ref. 12860]). •Valid as Hisonotus taimensis (Buckup 1981) -- (Isbrücker 2001:28, 30 [ref. 25653], Isbrücker 2002:18 [ref. 27178], Aquino et al. 2001:9 [ref. 25673], Schaefer in Reis et al. 2003:323 [ref. 27061], Almirón & Azpelicueta 2006:93 [ref. 28713], Casciotta et al. 2006:150 [ref. 28758], Britski & Garavello 2007:414 [ref. 29429], Ferraris 2007:249 [ref. 29155], Carvalho et al. 2008:515 [ref. 29799], Garvalho & Reis 2011:19 [ref. 31240], Litz & Koerber 2014:24 [ref. 33622], Bertaco et al. 2016:418 [ref. 34561], Nión et al. 2016:31 [ref. 35565] with author without parentheses, Calegari et al. 2017:244 [ref. 35203], Loureiro et al. 2023:118 [ref. 40506]). Current status: Valid as Hisonotus taimensis (Buckup 1981). Loricariidae: Hypoptopomatinae. Distribution: South America: Mirim Lagon drainage (Brazil and Uruguay). Habitat: freshwater.

thayeri, Hisonotus Martins [F. de O.] & Langeani [F.] 2016:3, Figs. 1-3 [Neotropical Ichthyology v. 14 (no. 2) e150100; ref. 34533] Espírito Santo State, Guarapari, Rio Grande county near the frontier between Guarapari and Anchieta, Rio Benevente drainage, Brazil, 20°37'29"S, 40°37'3"W. Holotype: MNRJ 42382. Paratypes: MBML, MNRJ. Plus one additional non-type specimen [MCZ 8177]. Type catalog: Andrade et al. 2017:444 [ref. 35588]. •Valid as Hisonotus thayeri Martins & Langeani 2016 -- (Calegari et al. 2017:244 [ref. 35203], Vieira-Guimarães et al. 2024:45 [ref. 41258]). Current status: Valid as Hisonotus thayeri Martins & Langeani 2016. Loricariidae: Hypoptopomatinae. Distribution: South America: coastal basins (southeastern Brazil). Habitat: freshwater.

vespuccii, Hisonotus Roxo [F. F.], Silva [G. S. C.] & Oliveira [C.] 2015:128, Figs. 1-2a, 3 [ZooKeys No. 498; ref. 33763] Minas Gerais State, municipality of Pirapora, rio São Francisco, 17°21'00"S, 44°57'08"W, Brazil. Holotype: MZUSP 115274. Paratypes: LBP, MZUSP. •Valid as Hisonotus vespuccii Roxo, Silva & Oliveira 2015 -- (Calegari et al. 2017:244 [ref. 35203], Roxo et al. 2017:351 [ref. 35310], Roxo et al. 2018:[12] [ref. 35900], Dias et al. 2018:583 [ref. 36235]). Current status: Valid as Hisonotus vespuccii Roxo, Silva & Oliveira 2015. Loricariidae: Hypoptopomatinae. Distribution: Rio São Francisco, Brazil. Habitat: freshwater.

vireo, Hisonotus Carvalho [T. P.] & Reis [R. E.] 2011:33, 4f, 8f, 27a, 36-38 [Neotropical Ichthyology v. 9 (no. 1); ref. 31240] Caraá, rio dos Sinos, bridge 7 Kilometers north of Caraá, road to Fundo Quente, 29°47'S, 50°19'W, Rio Grande do Sul, Brazil. Holotype: MCP 44518. Paratypes: ANSP 188704 (4); MCP 14619 (7, 3 c&s), 17620 (9), 17643 (6); MZUSP 104946 (4). Plus non-type material. •Valid as Hisonotus vireo Carvalho & Reis 2011 -- (Roxo et al. 2015:139 [ref. 33763], Zawadzki et al. 2016:381 [ref. 34367], Roxo et al. 2016:236 [ref. 34426], Bertaco et al. 2016:418 [ref. 34561], Calegari et al. 2017:244 [ref. 35203], Roxo et al. 2018:[13] [ref. 35900]). Current status: Valid as Hisonotus vireo Carvalho & Reis 2011. Loricariidae: Hypoptopomatinae. Distribution: Rio Jacuí basin, Brazil. Habitat: freshwater.

yasi, Epactionotus Almirón [A. E.], Azpelicueta [M. de las M.] & Casciotta [J. R.] 2004:138, Figs. 1-3 [Zoologische Abhandlungen; Staatliches Museum für Tierkunde in Dresden v. 54; ref. 27988] Arroyo Lobo, 25°42'57"S, 54°05'59"W, río Iguazú basin, Misiones Province, Argentina. Holotype: MACN-ict 8649. Paratypes: MHNG 2643.86 (5), MLP 10456 [ex Al 159] (4), MTD 27826-30 (5). Type catalog: Ferraris 2007:236 [ref. 29155], Nadalin & López 2015:6 [ref. 34112]. •Valid as Epactionotus yasi Almirón, Azpelicueta & Casciotta 2004 -- (Ferraris 2007:236 [ref. 29155], Koerber 2011:5 [ref. 31122], Koerber 2014:9 [ref. 33621], Mirande & Koerber 2015:41 [ref. 35117]). •Valid as Hisonotus yasi (Almirón, Azpelicueta & Casciotta 2004) -- (Koerber et al. 2017:6 [ref. 35083], Calegari et al. 2017:244 [ref. 35203], Koerber et al. 2017:7 [ref. 35632], Koerber et al. 2019:8 [ref. 36736], Mirande & Koerber 2020:2 [ref. 37594], Reis et al. 2020:469 [ref. 38364]). Current status: Valid as Hisonotus yasi (Almirón, Azpelicueta & Casciotta 2004). Loricariidae: Hypoptopomatinae. Distribution: South America: Iguaçu River basin (Argentina and Brazil). Habitat: freshwater.