-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. The Hyla pseudopseudis species group consists of two species, H. pseudopseudis Miranda-Ribeiro, 1937, and Hyla saxicola Bokermann, 1964 (Pombal and Caramaschi, 1995). A. Miranda-Ribeiro (1937) described H. pseudopseudis based on specimens from the Museu Nacional, Rio de Janeiro, although he did not provide the type-locality nor the types' numbers. Later, P. MirandaRibeiro (1953) named a lectotype and paralectotypes and cited as the type-locality. Veadeiros-Goias is now known as Alto Paraiso de Goias, Goias state (14?08'S; 47?31'W). Bokermann (1964) described H. saxicola based on specimens from the Serra do Cip6, municipality of Jaboticatubas, Minas Gerais state (19?17'S; 43?35'W), and considered the species similar to H. pseudopseudis but distinguished from it in having a smaller tympanum, different body color, and snout shape. Lutz (1973) considered these two species very similar and regarded them as subspecies, Hyla pseudopseudis pseudopseudis, from Goias, and Hyla pseudopseudis saxicola, from Minas Gerais, followed by subsequent authors (e.g., Duellman, 1977; Frost, 1985). Based on the analyses of the types and additional individuals, Pombal and Caramaschi (1995) demonstrated that the two forms should be regarded as full species in the same group, named H. pseudopseudis species group, presumably closely related to the Hyla circumdata species group, as indicated by the large body size and development of the prepolex. The H. circumdata species group is composed 2 Corresponding Author. of species with a well-developed prepolex, dark vertical stripes on the posterior surface of thighs, head usually wider than long, and robust forearm in males (Heyer, 1985; Caramachi and Feio, 1990; Pombal and Haddad, 1993). Heyer (1985) redefined the H. circumdata species group, including Hyla astartea Bokermann, 1967, Hyla carvalhoi Peixoto, 1981, H. circumdata Cope, 1867, Hyla hylax Heyer, 1985, Hyla izecksohni Jim and Caramaschi, 1979, and Hyla nanuzae Bokermann and Sazima, 1973. Caramaschi and Feio (1990) described Hyla ibitipoca and included it and Hyla ibitiguara Cardoso, 1983, Hyla sazimai Cardoso and Andrade, 1982, and Hyla martinsi Bokermann, 1964, in the H. circumdata species group. Pombal and Haddad (1993) described Hyla luctuosa and included it and Hyla gouveai Peixoto and Cruz, 1992, in the H. circumdata species group. In the description of Hyla biobeba, Bokermann and Sazima (1973) suggested it was part of the H. martinsi-Hyla langei species group. Caramaschi and Feio (1990) considered these species to be part of the H. circumdata species group. However, based on morphology and behavior, H. biobeba was considered to be related to species in the Hyla boans species group (e.g., Martins, 1993). The tadpoles of the two species of the H. pseudopseudis group remain undescribed. Based on recently available specimens including individuals from the type-locality, we describe herein the larvae of H. pseudopseudis and H. saxicola. The description of these tadpoles corroborates their validity as distinct species and the definition of the H. pseudopseudis species group, which is easily distinguishable from the H. circumdata This content downloaded from 207.46.13.51 on Sun, 19 Jun 2016 07:17:08 UTC All use subject to http://about.jstor.org/terms TADPOLES AND CALLS OF HYLA PSEUDOPSEUDIS GROUP group based on tadpole morphology. Advertisement calls (sensu Wells, 1977) of H. pseudopseudis and H. saxicola are also described and compared to those of species of the H. circumdata