oncinus, Arius Jardine [W.] in Schomburgk 1841:173, Pl. 4 [The Natural history of fishes of Guiana; ref. 18707] Padauiri River, Brazil. Syntypes: SMF 2669 [ex RMNH] (1, dry). Type catalog: Ferraris 2007:75 [ref. 29155]. Name spelled oncina in figure caption, oncinus in text; provisionally placed in Arius. Apparently Mees 1978:270 [ref. 22765] serves as first reviser selecting oncinus. •Valid as Liosomadoras oncinus (Jardine 1841) -- (Mees 1978:270 [ref. 22765], Ortega & Vari 1986:13 [ref. 9708], Burgess 1989:241 [ref. 12860], de Pinna 1998:311 [ref. 23847], Ferraris in Reis et al. 2003:475 [ref. 27061], Ferraris 2007:75 [ref. 29155], Akama & Ferraris 2011:59 [ref. 31467], Birindelli & Zuanon 2012:2 [ref. 31908], Birindelli 2014:535 [ref. 33501], DoNascimiento 2016:531 [ref. 34727], DoNascimiento et al. 2017:87 [ref. 35633], Calegari et al. 2019:[84] [ref. 36961]). Current status: Valid as Liosomadoras oncinus (Jardine 1841). Auchenipteridae: Auchenipterinae. Distribution: Amazon River basin: Brazil, Colombia and Venezuela. Habitat: freshwater.