simplex, Sarcoglanis Myers [G. S.] & Weitzman [S. H.] 1966:279, Figs. 1-2 [Journal of Zoology (London) v. 149; ref. 3136] Rock pools below São Gabriel Rapids, Rio Negro, Brazil. Holotype (unique): CAS-SU 50189. Type catalog: Ferraris 2007:412 [ref. 29155]. •Valid as Sarcoglanis simplex Myers & Weitzman 1966 -- (Burgess 1989:325 [ref. 12860], de Pinna & Starnes 1990:76 [ref. 19505], Costa & Bockmann 1994:716 [ref. 21339], de Pinna & Wosiacki in Reis et al. 2003:278 [ref. 27061], Proudlove 2006:269 [ref. 28992], Ferraris 2007:412 [ref. 29155], Mattos et al. 2008:161 [ref. 29875], Mattos & Lima 2010:233 [ref. 31040]). Current status: Valid as Sarcoglanis simplex Myers & Weitzman 1966. Trichomycteridae: Sarcoglanidinae. Distribution: Upper Negro River basin, Brazil. Habitat: freshwater.