A possible chelonian egg from the Brazilian late cretaceous

Anais da Academia Brasileira de Ciências

Sergio Alex Azevedo²  ValÉria Gallo¹  Jorge Ferigolo¹ 

[1] ,Universidade Federal do Rio de Janeiro Museu Nacional Departamento de Geologia e PaleontologiaRio de Janeiro RJ ,Brasil

关键词: Fossil egg;    chelonian;    Late Cretaceous;    Bauru Group;   

DOI  :  10.1590/S0001-37652000000200007

来源: SciELO

【 摘 要 】

This paper describes a possible fossil egg proceeding from the Bauru Group, Late Cretaceous of Paraná Basin, Brazil. External morphology, dimensions, texture and shell ornamentation examined under electron microscopy show close resemblance to the Recent podocnemidid chelonian eggs. Association with bony material in the outcrop suggests that it is related to a species of Podocnemis. Computerized tomography reveals a high density outer region corresponding to the shell component layers, and successive layers with decreasing density towards the nucleus. An area of high density in the central region may represent remains of an embryo.

【 授权许可】

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