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