bicolor, Phractocephalus Spix [J. B. von] & Agassiz [L.] 1829:23, Pl. 6 [Selecta genera et species piscium quos in itinere per Brasiliam; ref. 13] Amazon River. No types known. Type catalog: Ferraris 2007:336 [ref. 29155]. As Pirarara bicolor on plate. •Synonym of Phractocephalus hemioliopterus (Bloch & Schneider 1801) -- (Boeseman 1983:108 [ref. 5329], Burgess 1989:282 [ref. 12860], Lundberg & Littmann in Reis et al. 2003:438 [ref. 27061], Ferraris 2007:336 [ref. 29155], Grant 2021:83 [ref. 38702]). Current status: Synonym of Phractocephalus hemioliopterus (Bloch & Schneider 1801). Pimelodidae. Habitat: freshwater.