brevior, Auchenipterus Eigenmann [C. H.] 1912:202 [Memoirs of the Carnegie Museum v. 5 (no. 1); ref. 1227] Tumatumari, Guyana. Holotype: FMNH 53249 [ex CM 1715]. Paratypes: (20) BMNH 1911.10.31.97-98 (2); CAS 52135 [IU 12092 & 12108] (5); CAS-SU 21934 (1, missing in 1995); FMNH 7403 (1), 53250 (3), 69686 (2); MCZ 30190 [ex CM 1716b] (1),;NMW 47389 (1); USNM 66102 [ex CM] (1); ZMA 104668 (1). Type catalog: Henn 1928:73 [ref. 12305], Böhlke 1953:42 [ref. 12291], Nijssen et al. 1982:39 [ref. 19236], Ibarra & Stewart 1987:14 [ref. 12367], Ferraris & Vari 1992:11 [ref. 19771], Ferraris 2007:72 [ref. 29155]. •Synonym of Auchenipterus nuchalis (Spix & Agassiz 1829) -- (Burgess 1989:241 [ref. 12860]). •Valid as Auchenipterus brevior Eigenmann 1912 -- (Ferraris & Vari 1999:400 [ref. 23953], Ferraris in Reis et al. 2003:473 [ref. 27061], Ferraris 2007:72 [ref. 29155], Calegari et al. 2019:[96] [ref. 36961], Taphorn et al. 2022:43 [ref. 41297]). Current status: Valid as Auchenipterus brevior Eigenmann 1912. Auchenipteridae: Auchenipterinae. Distribution: South America: Potaro River basin (Guyana) endemic. Habitat: freshwater.