trachycorystes, Auchenipterus Valenciennes [A.] in Cuvier & Valenciennes 1840:214, Pl. 437 [Histoire naturelle des poissons v. 15; ref. 1008] Amazon River basin, Brazil. Holotype (unique): MNHN A-9422 (dry). Type catalog: Bertin & Estève 1950:17 [ref. 19575], Royero & Hureau 1996:372 [ref. 22752], Ferraris 2007:80 [ref. 29155]. •Valid as Trachycorystes trachycorystes (Valenciennes 1840) -- (Burgess 1989:242 [ref. 12860], Ferraris in Reis et al. 2003:479 [ref. 27061], Ferraris 2007:80 [ref. 29155], Britski & Akama 2011:274 [ref. 31386], Akama & Ferraris 2011:59 [ref. 31467], Barriga Salazar 2014:116 [ref. 35745], DoNascimiento et al. 2017:87 [ref. 35633], Calegari et al. 2019:[85] [ref. 36961], Silvano et al. 2020:219 [ref. 38135], Meza-Vargas et al. 2021:23 [ref. 39298]). Current status: Valid as Trachycorystes trachycorystes (Valenciennes 1840). Auchenipteridae: Auchenipterinae. Distribution: South America: Amazon River basin (Brazil, Colombia, Ecuador and Peru). Habitat: freshwater.