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.