Brief Communication

Palaeobiology: Argentinian unhatched pterosaur fossil

  • Nature volume 432, pages 571572 (02 December 2004)
  • doi:10.1038/432571a
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Abstract

Our knowledge of the eggs and embryos of pterosaurs, the Mesozoic flying reptiles, is sparse. Until now, the recent discovery of an ornithocheirid embryo from 121-million-year-old rocks in China1 constituted the only reliable evidence of an unhatched pterosaur. Here we describe an embryonic fossil of a different pterosaur from the Early Cretaceous lacustrine deposits of Loma del Pterodaustro (the Lagarcito Formation, which is about 100 million years old) in central Argentina. This new fossil provides insight into the eggshell morphology, early growth and nesting environments of pterosaurs.

New pterosaur-egg features add to our understanding of these extinct flying reptiles.

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Author information

Affiliations

  1. *Department of Vertebrate Paleontology, Natural History Museum of Los Angeles County, Los Angeles, California 90007, USA

    • Luis M. Chiappe
    •  & Gerald Grellet-Tinner
  2. †Departamento Geología, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis, Argentina

    • Laura Codorniú
    •  & David Rivarola
  3. ‡Department of Earth Sciences, University of Southern California, Los Angeles, California 90089, USA

    • Gerald Grellet-Tinner

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Competing interests

The authors declare no competing financial interests.

Corresponding author

Correspondence to Luis M. Chiappe.

Supplementary information

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