orbignyanus, Chalceus Valenciennes [A.] in Cuvier & Valenciennes 1850:249 [Histoire naturelle des poissons v. 22; ref. 1014] Buenos Aires, Argentina. Lectotype: MNHN A-9835 (larger specimen). Paralectotype: MNHN A-9835 [same number as lectotype] (1). Type catalog: Bertin 1948:15 [ref. 19577]. Lectotype selected by Géry & Mahnert 1992:807 [ref. 27146]. •Valid as Brycon orbignyanus (Valenciennes 1850) -- (Howes 1982:38 [ref. 14201], Géry & Mahnert 1992:806 [ref. 27146], Gómez & Chebez 1996:48 [ref. 23791] as orbygnianus, Sverlij et al. 1998:16 [ref. 27632], Lima in Reis et al. 2003:177 [ref. 27061], López et al. 2003:18 [ref. 27366] as orbygnianus, Lima 2004:282 [ref. 27858] as orbignianus, Menni 2004:74 [ref. 28131] as orbygnianus, Mirande 2010:483 [ref. 31006], Barriga Salazar 2014:108 [ref. 35745], Litz & Koerber 2014:10 [ref. 33622], Mirande & Koerber 2015:17 [ref. 35117], Bertaco et al. 2016:411 [ref. 34561], Nión et al. 2016:28 [ref. 35565] dated 1849, Koerber et al. 2017:26 [ref. 35267], Lima 2017:90 [ref. 35071], Reis et al. 2020:457 [ref. 38364], Brandão et al. 2023:85 [ref. 40464], Loureiro et al. 2023:52 [ref. 40506]). Current status: Valid as Brycon orbignyanus (Valenciennes 1850). Bryconidae: Bryconinae. Distribution: South America: Argentina, Paraguay, Brazil, Ecuador and Uruguay. Habitat: freshwater.