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 Ageneiosus 1. Caudal fin truncate; body deep, its depth contained 4.5 to 5 times in standard length ................................. A. inermis 1’. Caudal fin bifurcate; body elongated, its depth contained 5.7 to 7.5 times in standard length...................... 2 2. Dorsum with a black longitudinal band, sometimes interrupted by light-beige irregular blotches; mouth cleft inverted U-shaped in ventral view ...................... A. militaris 2’. Dorsum uniformly dark-grey; mouth cleft inverted V-shaped in ventral view................................ A. ucayalensis