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Cretaceous plesiosaurs ate ammonites

Author

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  • Tamaki Sato

    (University of Cincinnati
    University of Calgary)

  • Kazushige Tanabe

    (Geological Institute, Graduate School of Science, University of Tokyo)

Abstract

The Plesiosauria, large Mesozoic marine reptiles, have been regarded as dominant predators in Mesozoic seas, although there is only a little (including some doubtful) direct evidence of their stomach contents1,2,3,. Here we report the occurrence in Hokkaido, northern Japan, of a partial skeleton of a Cretaceous short-necked plesiosaur together with a large number of isolated ammonoid jaws. This is, to our knowledge, the first description of the stomach contents of a polycotylid plesiosaur, and the first firm evidence of prey-predator relationships between plesiosaurs and ammonites.

Suggested Citation

  • Tamaki Sato & Kazushige Tanabe, 1998. "Cretaceous plesiosaurs ate ammonites," Nature, Nature, vol. 394(6694), pages 629-630, August.
    • Handle: RePEc:nat:nature:v:394:y:1998:i:6694:d:10.1038_29199
    DOI: 10.1038/29199
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