Two new species of brachycephalus (anura: brachycephalidae) from the atlantic forest in parana´ state, southern brazil

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Herpetologica, 62(2), 2006, 221–233 Ó 2006 by The Herpetologists’ League, Inc.

TWO NEW SPECIES OF BRACHYCEPHALUS (ANURA: BRACHYCEPHALIDAE) FROM THE ATLANTIC FOREST ´ IN PARANA STATE, SOUTHERN BRAZIL
´ ANA C. R. ALVES1, LUIZ F. RIBEIRO2,3,4, CELIO F. B. HADDAD1,
1

AND

´ SERGIO F.

DOS

REIS5,6

ˆncias, Universidade Estadual Paulista, Departamento de Zoologia, Instituto de BiocieCaixa Postal 199, 13506-900, Rio Claro, SP, Brazil 2 ´, Universidade Tuiuti do Parana Rua Marcelino Champagnat, 505, 80710-250, Curitiba, PR, Brazil 3 Mater Natura, Instituto de Estudos Ambientais, Rua Desembargador Westphalen, 15–168 andar, 80010-110, Curitiba, PR, Brazil 4 ´s-Graduaca em Gene ´tica e Biologia Molecular, Instituto de Biologia, Programa de Po ¸ ˜o Universidade Estadual de Campinas,Caixa Postal 6109, 13083-970, Campinas, SP, Brazil 5 Departamento de Parasitologia, Instituto de Biologia, Universidade Estadual de Campinas, Caixa Postal 6109, 13083-970, Campinas, SP, Brazil ABSTRACT: Two new species of brachycephalid frogs are described from Pico Marumbi, municipality of ´ Morretes, and Pico da Igreja, municipality of Guaratuba, Parana State, southern Brazil. The new speciesshare the following attributes: body bufoniform; skin on top of the head, and central part of the back body smooth with no dermal co-ossification; outer metatarsal tubercle distinct; dermal roofing bones of skull unornamented; all paired cranial bones distinct and not fused; quadratojugals, and maxillary odontoids present. The new species from Pico Marumbi is characterized by male SVL 5 11.6–12.5 andfemale SVL 5 13.0–14.5 mm; and general color orange with dorsal reddish-brown irregular markings, lateral surfaces with small dark brown spots, and belly with brownish spots and small dots. The new species from Pico da Igreja is characterized by male SVL 5 12.6–13.9 and female SVL 5 14.6–15.3 mm; and general color orange, lateral surfaces with small dark brown spots, and belly with brownishcoalescent spots and small dots. Comparisons with other brachycephalid species and osteological data are provided. Key words: Amphibia; Anura; Atlantic Forest; Brachycephalidae; Brachycephalus; New species; Osteology; Southern Brazil

THE FAMILY Brachycephalidae is monotypic (Frost, 2004). The species of the genus Brachycephalus have snout–vent length ,1.8 cm, phalangeal loss, and reduced number oftoes and are believed to have evolved by miniaturization (Yeh, 2002). These small frogs inhabit leaf litter and are endemic to the Atlantic rainforest of southeastern and southern Brazil (Giaretta and Sawaya, 1998; Izecksohn, 1971; Miranda-Ribeiro, 1920; Pombal, 2001; Pombal et al., 1998). Until recently, the known diversity of Brachycephalus included six species occurring in the States of Rio de ´˜ Janeiro, Sao Paulo, and Parana, namely, Brachycephalus didactylus (Izecksohn, 1971), Brachycephalus ephippium (Spix, 1824), Brachycephalus hermogenesi (Giaretta and Sawaya, 1998), Brachycephalus nodoterga Miranda-Ribeiro, 1920, Brachycephalus pernix Pombal, Wistuba and Bornschein, 1998, and Brachycephalus vertebralis Pombal, 2001.
6

CORRESPONDENCE: e-mail, sfreis@unicamp.br 221

As aresult of recent herpetological surveys in the mountain slopes of the Serra do Mar, we discovered two undescribed species from the ˜ State of Sao Paulo and four undescribed ´ species from the State of Parana. These findings double the known diversity of Brachycephalus. We have already described two of the four new species from the State of ´, Parana namely, Brachycephalus brunneus Ribeiro, Alves,Haddad, and Reis, 2005 and Brachycephalus izecksohni Ribeiro, Alves, Haddad, and Reis, 2005, and here we described the other two species. The diagnoses of the two new species are based on the color, external morphology, and ostelogy of adults. Additionally, we used continuous metric traits to characterize these two new species morphometrically and discriminate them from B. brunneus, B. pernix, and B....
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