breviceps, Bryconamericus Eigenmann [C. H.] 1908:105 [Bulletin of the Museum of Comparative Zoology v. 52 (no. 6); ref. 1221] Rio Tocantins, Goiás, Brazil. Syntypes: (many) MCZ 20692 (2), USNM 120274 [ex MCZ 20692] (4). Type catalog: Vari & Howe 1991:10 [ref. 19022]. •Valid as Bryconamericus breviceps Eigenmann 1908 -- (Román-Valencia 2002:209 [ref. 27206], Román-Valencia 2003:7 [ref. 27070], Román-Valencia 2005:47 [ref. 28949]). •Valid as Knodus breviceps (Eigenmann 1908) -- (Ortega & Vari 1986:8 [ref. 9708], Silva in Reis et al. 2003:143 [ref. 27061], Ferreira & Lima 2006:635 [ref. 28919], Mirande 2010:536 [ref. 31006], Barriga Salazar 2014:107 [ref. 35745], Esguícero & Castro 2014:47 [ref. 33506], Sarmiento et al. 2014:184 [ref. 35004], Thomaz et al. 2015:Add. 5 [ref. 33893], DoNascimiento et al. 2017:58 [ref. 35633], Deprá et al. 2021:24 [ref. 38180], Meza-Vargas et al. 2021:19 [ref. 39298], Ferreira 2024:210 [ref. 40817]). Current status: Valid as Knodus breviceps (Eigenmann 1908). Stevardiidae: Diapominae. Distribution: South America: Amazon and Orinoco river basins (Brazil, Ecuador, Colombia, Peru and Bolivia). Habitat: freshwater.