Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated Author Ota, Renata Rúbia Author Deprá, Gabriel de Carvalho Author Graça, Weferson Júnio da Author Pavanelli, Carla Simone text Neotropical Ichthyology 2018 2018-06-11 16 2 1 111 journal article 10.1590/1982-0224-20170094 f68fe85c-2a4c-4625-b684-74f61398d6c2 1982-0224 3678395 Serrasalmus 1. Caudal-fin margin hyaline, preceded by a black transverse bar; dorsal profile of the head little concave..... ........................................................................... S. maculatus 1’. Caudal-fin margin black in variable length, sometimes extending up to the base of caudal fin; dorsal profile of the head very concave........................................... S. marginatus