gymnogenys, Serrasalmo Günther [A.] 1864:371 [Catalogue of the fishes in the British Museum v. 5; ref. 1974] Guyana. Syntypes: (3) BMNH 1971.5.10.59 (1) British Guiana [Guyana], 1849.11.8.33 (1) Rio Capin [= Capim], Pará State, Brazil. •Synonym of Serrasalmus aureus (Spix & Agassiz 1829), but a valid subspecies -- (Géry 1972:218 [ref. 1594]). •Synonym of Pristobrycon aureus (Spix & Agassiz 1829) -- (Jégu in Reis et al. 2003:188 [ref. 27061]). •Synonym of Serrasalmus aureus Spix & Agassiz 1829 -- (Ota et al. 2024:423 [ref. 40817]). Current status: Synonym of Serrasalmus aureus Spix & Agassiz 1829. Serrasalmidae: Serrasalminae. Habitat: freshwater.