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 Otothyropsis 1. Caudal fin with dark-brown spots, sometimes forming irregular transverse stripes; ventral caudal-fin lobe without a light-beige irregular blotch......................... O. marapoama 1’. Caudal fin without dark-brown spots; ventral caudalfin lobe dark-brown, with a light-beige irregular blotch.... ............................................................................ O. polyodon