The species is represented by an adult male (MTR = 85.11 mm; MDL = 91.41 mm; BB = 76.09 mm); writing on the skull reads “ San Paulo Sello” (Fig. 8 a). This locality is probably incorrect, since the species occurred only in marshy habitats in western São Paulo, along the banks of the Rio Paraná, a region not visited by Sellow (Piovezan et al. 2010). The species also occurred in Brazil and Uruguay, along the banks of the Rio Uruguay (Piovezan et al. 2010), and it is more probable that this specimen came from these countries, near that river.