A description of the tadpoles and advertisement calls of members of the Hyla pseudopseudis group

The Hyla pseudopseudis group includes two species, H. pseudopseudis and Hyla saxicola, whose tadpoles are found mainly in rocky streams in the interior highlands of Brazil. They have large, robust, ovoid bodies, and muscular tails. The group is supposedly related to the Hyla circumdata group, whose relations with the Hyla boans group are not clear. The H. pseudopseudis group can be distinguished easily from those groups by tadpole morphology. Tadpoles of H. pseudopseudis and H. saxicola differ from each other mainly in body shape in lateral view, size of oral disc, number of tooth rows on the posterior labium, interorbital distance, and pattern of tail patches. The advertisement calls are pulsed both in species of the H. circumdata and H. pseudopseudis species groups, and species can be told apart by differences in frequency and number of pulses in their calls. The advertisement call of H. saxicola can be distinguished from that of H. pseudopseudis by having shorter, faster pulses and more harmonics.