A compsemydid turtle from the Upper Cretaceous of Var,southern France |
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Institution: | 1. Palaeontological Research and Education Centre, Mahasarakham University, Kantharawichai District, Maha Sarakham Province 44150, Thailand;2. Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Science, Beijing 100044, China;3. Réserve Naturelle de Sainte-Victoire, Département des Bouches-du-Rhône, Hôtel du Département, 52, avenue Saint-Just, 13256 Marseille cedex 20, France;4. CNRS, UMR 8538, Laboratoire de géologie de l’École normale supérieure, PSL Research University, 23, rue Lhomond, 75231 Paris cedex 05, France;5. Muséum d’Histoire Naturelle d’Aix-en-Provence, 7, allée des Robiniers, 13090 Aix-en-Provence, France;6. Institut des Sciences de l’Évolution de Montpellier, CNRS/UM/IRD/EPHE, 2, place Eugène-Bataillon, cc64, 34095 Montpellier cedex 5, France |
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Abstract: | Calissounemys matheroni gen. et sp. nov. (Testudines) is described on the basis of a skull and shell elements from the Upper Cretaceous of Var, southern France. This new taxon is assigned to the family Compsemydidae and characterized by a thick-boned, robust skull, a shallow temporal emargination, a crista supraoccipitalis not extending beyond the posterior edge of the skull roof, large nasals meeting along the midline for their full length; frontals retracted from the orbital margin, absence of a cheek emargination, a large jugal forming a substantial part of the orbital margin, absence of a secondary palate and an uneven upper triturating surface; and the shell with vertebral 1 clearly wider than vertebrals 2-3, with the lateral margins strongly divergent towards the anterior border and wider than long vertebrals 2-3. This find increases the diversity of the Late Cretaceous turtle fauna from southern France, and fills a stratigraphical gap in the fossil record of Compsemydidae between the Early Cretaceous and the Paleocene in Europe. |
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Keywords: | Testudines Compsemydidae Systematics Campanian France Testudines Compsemydidae Systématique Campanien France |
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