pacu, Myletes Jardine [W.] in Schomburgk 1841:236, Pls. 20-21 [The Natural history of fishes of Guiana; ref. 18707] Essequibo River, Guyana. No types known. •Valid as Myleus pacu (Jardine 1841) -- (Géry 1972:178 [ref. 1594], Taphorn 1992:278 [ref. 23654] as cf. pacu, Planquette et al. 1996:366 [ref. 22818], Jégu & Santos 2002:52 [ref. 26050], Barriga Salazar 2014:108 [ref. 35745], DoNascimiento et al. 2017:[2] [ref. 35679] with authors as Jardine & Schomburgk). •Species inquirenda in Myleus -- (Jégu in Reis et al. 2003:187 [ref. 27061], Ota et al. 2024:412 [ref. 40817]). Serrasalmidae: Myleinae. Habitat: freshwater.