Rivulus tocantinensis
Rivulus xinguensis
Costa, W.J.E.M. (2010): Two new species of the Rivulus urophthalmus group from the Tocantins and Xingu river drainages, eastern Brazilian Amazon (Cyprinodontiformes: Rivulidae).
Ichthyological Exploration of Freshwaters, 21 (1): 79-85.