sericeus, Chaetostomus Cope [E. D.] 1872:288 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 23; ref. 921] Río Ambyiacu, Peru. Lectotype: ANSP 22005. Type catalog: Böhlke 1984:124 [ref. 13621], Ferraris 2007:230 [ref. 29155]. Original genus is correctly Chaetostoma. Original mentions two specimens; lectotype established by Fowler 1915:234 [ref. 1392]. •Valid as Chaetostoma sericeum Cope 1872 -- (Isbrücker 1980:63 [ref. 2303], Ortega & Vari 1986:17 [ref. 9708], Burgess 1989:436 [ref. 12860], Isbrücker 2001:26 [ref. 25653], Isbrücker 2002:13 [ref. 27178], Fisch-Muller in Reis et al. 2003:382 [ref. 27061], Salcedo 2006:63 [ref. 28542], Ferraris 2007:230 [ref. 29155], Barriga Salazar 2014:113 [ref. 35745]). •Valid as Ancistrus sericeus (Cope 1872) -- (Lujan et al. 2015:673 [ref. 33975], Meza-Vargas et al. 2021:25 [ref. 39298]). Current status: Valid as Ancistrus sericeus (Cope 1872). Loricariidae: Hypostominae. Distribution: South America: Ecuador and Peru. Habitat: freshwater.