Discovery of the genus UNDERWOOD & WARD (Elasmobranchii, Neoselachii) in the Upper Jurassic of southwestern France. Découverte du genre Proheterodontus UNDERWOOD & WARD (Elasmobranchii, Neoselachii) dans le Jurassique supérieur du Sud-Ouest de la France.

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Abstract:

Teeth of the heterodontiform genus 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 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.

French
Des dents de l'hétérodontiforme Proheterodontus sont décrites du Kimméridgien inférieur de La Rochelle (Sud-Ouest de la France). La présence dans le Jurassique supérieur de ce genre méconnu est inédite. Bien distinct de la forme contemporaine Heterodontus semirugosus (PLIENINGER), cet hétérodontiforme semble caractérisé par un régime alimentaire non durophage. D'un point de vue paléoécologique, il est lié à des faciès bioclastiques et devait être inféodé à des milieux récifaux à périrécifaux peu profonds.

Keywords: ELASMOBRANCHII; HETERODONTIFORMES; PROHETERODONTUS; SW FRANCE; UPPER JURASSIC

Language: French

Document Type: Research Article

DOI: http://dx.doi.org/10.1127/0077-7749/2007/0243-0371

Publication date: March 1, 2007

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