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.