Decouverte du genre Proheterodontus UNDERWOOD & WARD (Elasmobranchii, Neoselachii) dans le Jurassique superieur du Sud-Ouest de la France

摘要

Teeth of the heterodontiform genus Proheterodontus are described from the Lower Kimmeridgian of La Rochelle (SW France). It is the first occurrence of this poorly known genus in the Upper Jurassic. This form is distinguished from the Late Jurassic Hetemdontus semirugosus by its apparently non-durophagous feeding behaviour. It has been found in bioclastic facies and seems to have lived in reefal to peri-reefal shallow marine environments.