, Volume 98, Issue 6, pp 545–549 | Cite as

Direct evidence of hybodont shark predation on Late Jurassic ammonites

  • Romain VulloEmail author
Short Communication


Sharks are known to have been ammonoid predators, as indicated by analysis of bite marks or coprolite contents. However, body fossil associations attesting to this predator–prey relationship have never been described so far. Here, I report a unique finding from the Late Jurassic of western France: a complete specimen of the Kimmeridgian ammonite Orthaspidoceras bearing one tooth of the hybodont shark Planohybodus. Some possible tooth puncture marks are also observed. This is the first direct evidence of such a trophic link between these two major Mesozoic groups, allowing an accurate identification of both organisms. Although Planohybodus displays a tearing-type dentition generally assumed to have been especially adapted for large unshelled prey, our discovery clearly shows that this shark was also able to attack robust ammonites such as aspidoceratids. The direct evidence presented here provides new insights into the Mesozoic marine ecosystem food webs.


Ammonites Hybodont sharks Predation Jurassic France 



The author thanks B. and G. Vaubourg for having let access to the specimen for study and M. Ginter who kindly provided the photograph of the Glikmanius tooth. The comments and constructive remarks of J. Rees and an anonymous reviewer have greatly improved the quality of this paper.


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Université de Rennes 1UMR CNRS 6118RennesFrance

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