occidentalis, Hypostomus gymnorhynchus Boeseman [M.] 1968:47, Pl. 6 (figs. 1-4) [Zoologische Verhandelingen (Leiden) No. 99; ref. 7872] Suriname River near Brokopondo, Suriname. Holotype: RMNH 25520. Paratypes: RMNH 25479-80 (3, 1). Type catalog: Ferraris 2007:257 [ref. 29155]. •Valid as Hypostomus occidentalis Boeseman 1968 -- (Isbrücker 1980:29 [ref. 2303], Burgess 1989:432 [ref. 12860], Isbrücker 2001:28 [ref. 25653], Isbrücker 2002:19 [ref. 27178], Weber in Reis et al. 2003:361 [ref. 27061], Armbruster 2004:79 [ref. 27644], Ferraris 2007:257 [ref. 29155]). •Synonym of Hypostomus gymnorhynchus (Norman 1926) -- (Weber et al. 2012:215 [ref. 31999]). Current status: Synonym of Hypostomus gymnorhynchus (Norman 1926). Loricariidae: Hypostominae. Distribution: South America: Suriname River basin, Suriname [if valid.]. Habitat: freshwater.