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Vertebrate microremains from the Early Cretaceous of southern Tunisia |
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| Authors: | Gilles Cuny Andrea M Cobbett Michael J Benton |
| Institution: | a Natural History Museum of Denmark, 5-7 Øster Voldgade, 1350 Copenhagen K, Denmark b Department of Earth Sciences, University of Bristol, Wills Memorial Building, Queen's Road, Bristol BS8 1RJ, UK c UMR 5178 du CNRS, biodiversité et dynamique des communautés aquatiques, département des milieux et peuplements aquatiques, Muséum national d’histoire naturelle, 43, rue Cuvier, 75231 Paris cedex 05, France d UMR 7179 du CNRS, mécanismes adaptatifs : squelette des vertébrés, UPMC, case 7077, 2, place Jussieu, 75251 Paris cedex 05, France |
| Abstract: | Microremains of various sharks, actinopterygians and crocodiles have been recovered from two sites in the Douiret Formation and three sites in the Aïn el Guettar Formation in southern Tunisia. The presence of an actinistian is also suggested based on histological study of hemisegments of lepidotrichia. Convergence in dental enameloid microstructure between neoselachian sharks and actinopterygians sharing a tearing dentition is also documented. The vertebrate assemblage of the Douiret Formation suggests a pre-Aptian age for this formation and the presence of Bernissartia in the Aïn el Guettar Formation confirms faunal exchange between Africa and Europa during the Early Cretaceous. |
| Keywords: | Continental Intercalaire Sharks Actinopterygians Actinistians Crocodiles |
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