Papeis Avulsos de Zoologia MUSEU DE ZOOLOGIA DA UNIVERSIDADE DE SAO PACLO [SSS 0031 -1049 PAPtlSAVULSOS ZOOL., S. PAuLO 4[(23); 407-425 02.1II.200[ A NEW SPECIES OF LEPTODACfYLID FROG FROM THEATLANTIC FORESTS OF SOUTl IEASTERN BRAZIL WITH NOTES ON THE STATUS AND ON THE SPECIATION OF THE HYLODES SPECIES GROUPS. DA:-lTE PAVA:-l 1 PATRiCIA NARVAES 1 1 MJGU El TREFAUT RODRIGUES ,2 ABSTRACT A new species ofthe leptodactylidfrog genus Hylodes is describedfrom Praia do Guarau (24°23' Sand 47°01' W), in the coastal Atlantic Forest ofthe State ofsao Paulo, southeastern Brazil. The new species is a member ofthe Hylodes nasus group and is characterized by its small size, by a tubercular dorsal skin and by a conspicuous red coloration around the vent in males. Descriptions ofthe advertisement call, tadpole morphology and data on natural history are provided. The new species is thought to be related to the parapatric IIylodes asper. Thesystematic status ofHylodes species groups and the allopatric speciation mechanisms probably involved in the differentiation ofthe Atlantic Forest stream-adaptedfrogs are discussed. Keywords: Anura, Leptodactylidae, new species, Hylodes, speciation, Atlantic Forest, Brazil. I. Universidadc de Silo Paulo, Institute de Biocicncias, Departamento de Zoologia, Caixa Postal [1461, CEP 05422-970, Silo Paulo-SP, Brasil. email:
[email protected];
[email protected]. 2. Museu de Zoologia, Universidade de Sao Paulo, Caixa Postal 42.694, CEP 04299-970, Silo Paulo-SP, Brasil, email:
[email protected]. Trabalho recebido para publicacao em 14.V[1.1999 c accito em 09.Y.2000. 408 Papeis Avulsos de Zoologia INTRODUCTION Leptodactylid frogs ofthe genus Hylodes, Fitzinger 1826, are restricted to southern and southeastern Brazil (Haddad et al., 1996; Frost, 1996).