hoplogenys, Chaetostomus Günther [A.] 1864:247 [Catalogue of the fishes in the British Museum v. 5; ref. 1974] Rio Capin [= Capim], Pará State, Brazil. Syntypes: BMNH 1849.11.8.89-91 (3), ? BMNH 1864.1.21.85 (1). Type catalog: Ferraris 2007:221 [ref. 29155]. Original genus is correctly Chaetostoma. •Valid as Ancistrus hoplogenys (Günther 1864) -- (Ovchynnyk 1967:39 [ref. 37559], Isbrücker 1980:69 [ref. 2303], Ortega & Vari 1986:16 [ref. 9708], Burgess 1989:437 [ref. 12860], Knaack 1999:152 [ref. 23874], Britski et al. 1999:134 [ref. 24147], Le Bail et al. 2000:226 [ref. 24549] as aff. hoplogenys, Isbrücker 2001:25, 26 [ref. 25653], Isbrücker 2002:12 [ref. 27178], Fisch-Muller in Reis et al. 2003:376 [ref. 27061], López et al. 2003:53 [ref. 27366], Menni 2004:81 [ref. 28131], Ferraris 2007:221 [ref. 29155], Bifi et al. 2009:41 [ref. 30541], Barriga Salazar 2014:113 [ref. 35745], Koerber 2014:10 [ref. 33621] not in Argentina, Sarmiento et al. 2014:161, 191 [ref. 35004], de Oliveira et al. 2015:81 [ref. 33869], Nión et al. 2016:32 [ref. 35565], Koerber et al. 2017:60 [ref. 35267], see DoNascimiento et al. 2017:[20] [ref. 35679], Provenzano & Barriga-Salazar 2018:229 [ref. 36344], de Souza et al. 2019:62 [ref. 36504], Meza-Vargas et al. 2021:25 [ref. 39298]). Current status: Valid as Ancistrus hoplogenys (Günther 1864). Loricariidae: Hypostominae. Distribution: South America: Amazon and Paraguay River basins (Brazil, Peru, Bolivia, Paraguay, and Uruguay). Habitat: freshwater.