Head co-ossification, phragmosis and defence in the casque-headed tree frog Corythomantis greeningi

Head co-ossification, phragmosis and defence in the casque-headed tree frog Corythomantis greeningi

Autor Jared, Carlos Autor UNIFESP Google Scholar
Antoniazzi, Marta Maria Google Scholar
Navas, Carlos Arturo Google Scholar
Katchburian, Eduardo Autor UNIFESP Google Scholar
Freymüller Haapalainen, Edna Autor UNIFESP Google Scholar
Tambourgi, Denise Vilarinho Google Scholar
Rodrigues, Miguel Trefaut Google Scholar
Instituição Inst Butantan
Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Resumo Some anurans have a peculiar casqued head with the skin co-ossified with the underlying bones. This type of skull usually is associated with phragmosis, a protective behaviour in which the animal enters a hole and closes it with the head. Although co-ossification of the head in lissamphibians frequently has been associated with water economy, recent studies of Corythomantis greeningi, a casque-headed tree frog from semi-arid areas in north-eastern Brazil. suggest that cranial co-ossification contributes little to conservation of water in the frog. Instead. during phragmatic behaviour. the co-ossified head protects the animal against predators and indirectly enhances water balance. Thus, the primary role of co-ossification is defence, a hypothesis that is the focus of this study which describes die morphology of the head of C. greeningi with all emphasis on the co-ossification and the venom glands. We report on behavioural features and on the toxicity of the cutaneous secretion produced by the abundant venom glands that are associated with large spicules oil the skull.
Palavra-chave Amphibia
phragmosis
co-ossification
Corythomantis greeningi
defence
Idioma Inglês
Data de publicação 2005-01-01
Publicado em Journal of Zoology. New York: Cambridge Univ Press, v. 265, p. 1-8, 2005.
ISSN 0952-8369 (Sherpa/Romeo, fator de impacto)
Publicador Cambridge Univ Press
Extensão 1-8
Fonte http://dx.doi.org/10.1017/S0952836904005953
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000226535400002
Endereço permanente http://repositorio.unifesp.br/handle/11600/28094

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