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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.16 no.4 Curitiba  1999

http://dx.doi.org/10.1590/S0101-81751999000400004 

Oviposição e desenvolvimento de Brachycephalus ephippium (Spix) (Anura, Brachycephalidae)

 

Oviposition and development of pumpkin toadlet, Brachycephalus ephippium (Spix) (Anura, Brachycephalidae)

 

 

José P. Pombal Jr.

Departamento de Vertebrados, Museu Nacional. Quinta da Boa Vista, 20940-040 Rio de Janeiro, Rio de Janeiro, Brasil. Bolsista do CNPq

 

 


ABSTRACT

The Pumpkin toadlet, Brachycephalus ephippium (Spix, 1824), is an orangish daily anuran, which inhabits the litter of the Atlantic Forest of Southeastem Brazil. During a survey of this species' natural history in the vicinities of Campinas (22º52'S, 46º49'W), São Paulo State, field observations were made on the oviposition behavior, in which after the male left the oviposition site, the female covered the surface of ali eggs with soil particles. She pressed and rolled each egg against the ground using her hindfeet, until the eggs were indistinguishable from the litter background. A clutch was obtained in laboratory and two others were found in the field. After 25 days of development the embryo possess a big yolk sac, differentiated mouth and a small tail with caudal membranes poorly developed. After 41 days, fingers and toes are fully formed, the tail is relatively smaller than the previous state, the abdômen is large due to the yolk within, and the mouth possess two egg tooth. After 54 days, the tail remains as a small appendix, there is only one egg teeth, and body is densely pigmented. The hatehling oceurred after 64 days of development, the young possess reddish brown coloration, vestigial tail, and no egg teeth.

Key words: Brachycephalidae, Brachycephalus, development, oviposition behavior, anuran.


 

 

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AGRADECIMENTOS. Este trabalho foi parte da dissertação de mestrado do autor. Agradeço a Ivan Sazima, pela orientação segura e pelo incentivo durante toda minha formação. W.CA. Bokermann, C.f.B. Haddad por críticas e sugestões apresentadas a dissertação. R. Fernandes pela leitura do manuscrito e pela ajuda com o abstract. I. Sazima pelas fotografias das figuras 5 e 6. C.F.B. Haddad, O.C. Oliveira, E.C.P. Pombal, R.P. Pombal, I. Sazima e M. Rossato pela ajuda nos trabalhos de campo. P.S. Oliveira permitiu a utilização do estereomicroscópio para realização das fotografias. A FUJB e FAPERJ pelos auxílios concedidos.

 

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Recebido em 19.III.1998; aceito em 31.VIII.1999.

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