hilarii, Chalceus Valenciennes [A.] in Cuvier & Valenciennes 1850:246 [Histoire naturelle des poissons v. 22; ref. 1014] Rio São Francisco, Brazil [probably in error, possibly from the Rio Paraguai basin]. Lectotype: MNHN A.8616. Lectotype selected by Géry & Mahnert 1992:815 [ref. 27146]. •Valid as Brycon hilarii (Valenciennes 1850) -- (Howes 1982:31 [ref. 14201], Géry & Mahnert 1992:814 [ref. 27146], Lima in Reis et al. 2003:176 [ref. 27061], Lima 2004:282 [ref. 27858], Sarmiento et al. 2014:44, 184 [ref. 35004], Lima 2017:98 [ref. 35071], Koerber et al. 2017:26 [ref. 35267], Koerber et al. 2017:3 [ref. 35632], DoNascimiento et al. 2017:63 [ref. 35633], Dickens 2019:161 [ref. 37135], Koerber et al. 2019:3 [ref. 36736], Mirande & Koerber 2020:2 [ref. 37594], Reis et al. 2020:457 [ref. 38364], Meza-Vargas et al. 2021:20 [ref. 39298]). Current status: Valid as Brycon hilarii (Valenciennes 1850). Bryconidae: Bryconinae. Distribution: South America: Argentina, Brazil, Paraguay, Peru, Ecuador and Colombia. Habitat: freshwater.