Publicação: First record of petrified Permian pecopterids from the Parana Basin, Brazil (Corumbatai Formation, Passa Dois Group, northeastern State of São Paulo): Morphology, anatomy and paleoecological implications
Carregando...
Data
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Pergamon-Elsevier B.V. Ltd
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
Petrified pecopterids are described for the first time in the Parana Basin. They were collected at an outcrop of the Corumbatai Formation (Passa Dois Group, Middle Permian) in the Municipality of Piracicaba (State of São Paulo, Brazil). The assemblage is composed of Pecopteris taguaiensis Rohn and Rosler, 1986, Pecopteris sp. 1, Pecopteris sp. 2 and Pecopteris sp. 3. An emendation to the diagnosis of P. taguaiensis is proposed on the basis of the characteristics shown by the preserved three-dimensional external leaf morphology and partially by the epidermis (not available in the previously described impressions). The small size of the pinnules, the thick, downward-rolled leaf lamina, the thick veins, the straight walls of the epidermal cells, and the trichomes of the four pecopterid taxa may be interpreted as xeromorphic features developed in response to relatively dry climatic conditions and/or direct incidence of the sunlight. The leaves were impregnated with silica before the final burial, considering that they are fragmented, not deformed and associated with angular breccia clasts. (C) 2008 Elsevier Ltd. All rights reserved.
Descrição
Palavras-chave
Pecopteris, Pteridophylla, Ferns, Palaeobotany, Corumbatai Formation, Parana Basin, Permian, Xeromorphism
Idioma
Inglês
Como citar
Journal of South American Earth Sciences. Oxford: Pergamon-Elsevier B.V. Ltd, v. 27, n. 1, p. 60-73, 2009.
