12977 Mylossoma duriventre (Cuvier, 1818) Serrasalmidae Piranhas and pacus Colossomatinae Characiformes Teleostei South America: rio Paraguai, lower Paraná and lower Uruguai rivers basins. AMNH 12545 Mylossoma duriventris AMNH 12573 Mylossoma duriventris AMNH 40043 1964 Mylossoma duriventre AMNH 40089 1964 Mylossoma duriventre AMNH 40121 1964 Mylossoma duriventre AMNH 221361 1978 Mylossoma duriventre FISH 386792 13 S 50 W 1994 Mylossoma duriventre 2 - 5 m GCRL 29763 1999 Mylossoma duriventris