Resumen de A new lizard skull from the Purbeck Limestone Group (Lower Cretaceous) of England

Susan E. Evans, Marc E.H. Jones, Ryoko Matsumoto

• English

  The Purbeck Limestone Group of England has yielded a rich assemblage of Late Jurassic to Early Cretaceous (Berriasian) vertebrate fossils, including one of the most diverse Early Cretaceous lizard assemblages on record. Here we describe the first articulated lizard skull from Purbeck. The specimen was rediscovered in the collections of the British Geological Survey, having been excavated at least a century ago. Although originally assigned to the Purbeck genus Paramacellodus, with which it shares maxillary and some dental characters, the new Purbeck skull differs from other Purbeck genera, including Paramacellodus, in frontal, pterygoid and maxillary morphology. It is here assigned to a new genus and species. Cladistic analysis groups it with Lacertoidea, unlike Paramacellodus, Becklesius and Parasaurillus which group with scincids and cordyliforms.

• français

  Les couches de Purberck (Groupe du Calcaire de Purbeck, Anglaterre) ont produit un riche assemblage de vertébrés fossiles (Jurassique supérieur à Crétacé inférieur). Cet assemblage inclut de nombreux lézards du Crétacé (Berriasien). Ces lézards sont surtout représentés par des mâchoires isolées, avec peu de spécimens en connexion. Ici nous décrivons le premier crâne de lézard articulé du Purbeck Limestone