Potamotrygon 1. Dorsal surface of the disc with yellow or orange ocelli, larger than diameter of the eye, surrounded by a black ring, which do not extend distally over the tail................ P. amandae 1’. Dorsal surface of the disc entirely covered by white or yellow spots, oval or reniform, smaller than diameter of the eye, which extend distally over the tail.................. P. cf. falkneri

Published as part of Ota, Renata Rúbia, Deprá, Gabriel de Carvalho, Graça, Weferson Júnio da & Pavanelli, Carla Simone, 2018, Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated, pp. 1-111 in Neotropical Ichthyology 16 (2) on page 15, DOI: 10.1590/1982-0224-20170094, http://zenodo.org/record/3678395