scabriceps, Plecostomus commersonii var. Eigenmann [C. H.] & Eigenmann [R. S.] 1888:168 [Proceedings of the California Academy of Sciences (Series 2) v. 1 (pt 2); ref. 1249] São Matheos, Brazil. Syntypes: MCZ 7894 (2), BMNH 1904.1.28.2 [ex MCZ] (1). Type catalog: Ferraris 2007:260 [ref. 29155]. •Valid as Hypostomus scabriceps (Eigenmann & Eigenmann 1888) -- (Isbrücker 1980:33 [ref. 2303], Burgess 1989:432 [ref. 12860], Isbrücker 2001:28, 31 [ref. 25653], Isbrücker 2002:19 [ref. 27178], Weber in Reis et al. 2003:362 [ref. 27061], Armbruster 2004:80 [ref. 27644], Ferraris 2007:260 [ref. 29155], Zanata et al. 2013:248 [ref. 32751], Zanata & Pitanga 2016:231 [ref. 34535], Zawadzki et al. 2016:273 [ref. 34908]). Current status: Valid as Hypostomus scabriceps (Eigenmann & Eigenmann 1888). Loricariidae: Hypostominae. Distribution: São Mateus River basin, eastern Brazil. Habitat: freshwater.