osteomystax, Ceratocheilus Miranda Ribeiro [A. de] 1918:644 [16], Pl. [Revista do Museu Paulista v. 10; ref. 3725] Rio Vermelho, Santa Rita das Anitas, Goiás State, Brazil. Holotype (unique): MZUSP [ex DZSASP] 2317. Type catalog: Britski 1969:205 [ref. 12401], Ferraris 2007:72 [ref. 29155]. On p. 16 of separate. •Synonym of Auchenipterus nuchalis (Spix & Agassiz 1829) -- (Burgess 1989:241 [ref. 12860]). •Valid as Auchenipterus osteomystax (Miranda Ribeiro 1918) -- (Ferraris & Vari 1999:439 [ref. 23953], Ferraris in Reis et al. 2003:474 [ref. 27061], López et al. 2003:55 [ref. 27366], Menni 2004:83 [ref. 28131], Ferraris 2007:72 [ref. 29155], Litz & Koerber 2014:18 [ref. 33622], Sarmiento et al. 2014:143, 189 [ref. 35004], Mirande & Koerber 2015:30 [ref. 35117], Bertaco et al. 2016:416 [ref. 34561], Koerber et al. 2017:46 [ref. 35267], Calegari et al. 2019:[96] [ref. 36961], Reis et al. 2020:464 [ref. 38364], Loureiro et al. 2023:124 [ref. 40506]). Current status: Valid as Auchenipterus osteomystax (Miranda Ribeiro 1918). Auchenipteridae: Auchenipterinae. Distribution: South America: La Plata River basin, Tocantins River, and several rivers in lower Amazon River basin (Argentina, Brazil, Bolivia, Paraguay and Uruguay). Habitat: freshwater.