gamma, Knodus Géry [J.] 1972:52, Pl. 2 (fig. 3) [Acta Humboldtiana (Series Geologica, Palaeontologica et Biologica Nr. 2) No. 2; ref. 1595] Río Villano, affluent of River Cururay, Ecuador. Holotype: ZMH H1861. Paratypes: ZMH H2211 (2), Géry coll. (1). Type catalog: Wilkens 1977:156 [ref. 22013]. •Valid as Bryconamericus gamma (Géry 1972) -- (Román-Valencia 2003:24 [ref. 26840], Román-Valencia 2005:54 [ref. 28949]). •Mention -- (Ferreira & Lima 2006:637 [ref. 28919], Esguícero & Castro 2014:47 [ref. 33506]). •Valid as Knodus gamma Géry 1972 -- (Silva in Reis et al. 2003:143 [ref. 27061], Barriga Salazar 2014:107 [ref. 35745], Sarmiento et al. 2014:184 [ref. 35004], Thomaz et al. 2015:Add. 5 [ref. 33893], DoNascimiento et al. 2017:59 [ref. 35633], Deprá et al. 2021:24 [ref. 38180], Meza-Vargas et al. 2021:19 [ref. 39298]). Current status: Valid as Knodus gamma Géry 1972. Characidae: Stevardiinae. Distribution: South America: western Amazon River basin (Colombia, Ecuador, Peru and Bolivia). Habitat: freshwater.