asperatus, Hypostomus Castelnau [F. L.] 1855:41, Pl. 20 (fig. 2) [Animaux nouveaux or rares v. 2; ref. 766] Rio Araguay, Brazil. Syntypes: MNHN 0000-4601 (1), A-9442 (1, mounted). Type catalog: Bertin & Estève 1950:71 [ref. 19575] with A.9442 as holotype, Ferraris 2007:251 [ref. 29155] with a holotype. •Valid as Hypostomus asperatus Castelnau 1855 -- (Isbrücker 1980:19 [ref. 2303], Burgess 1989:430 [ref. 12860], Isbrücker 2001:28 [ref. 25653], Isbrücker 2002:18 [ref. 27178], Weber in Reis et al. 2003:356 [ref. 27061] with a holotype, Armbruster 2004:79 [ref. 27644], Ferraris 2007:251 [ref. 29155], Zawadzki et al. 2013:73 [ref. 32701], Penido et al. 2021:11 [ref. 38145]). Current status: Valid as Hypostomus asperatus Castelnau 1855. Loricariidae: Hypostominae. Distribution: Tocantins River basin, Brazil. Habitat: freshwater.