A new crocodylomorph tooth assemblage from the Tataouine Basin and comments on the stratigraphic context of the Douiret Formation |
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| Institution: | 1. Palaeontological Research and Education Centre, Mahasarakham University, Mahasarakham 44150, Thailand;2. Prehistoric Population and Cultural Dynamics in Highland Pang Mapha Project 6 th Floor, Princess Maha Chakri Sirindhorn Anthropology Centre, 20 Baromaratchachonnani Road, Taling Chan, Bangkok 10170, Thailand;1. Chongqing Laboratory of Geoheritage Protection and Research, No. 208 Hydrogeological and Engineering Geological Team, Chongqing Bureau of Geological and Mineral Resource Exploration and Development, 400700 Chongqing, China;2. Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Science, 100044 Beijing, China;3. CNRS (UMR 8538), Laboratoire de Géologie de l’École Normale Supérieure, PSL Research University, 24, rue Lhomond, 75231 Paris Cedex 05, France;4. Palaeontological Research and Education Centre, Mahasarakham University, Kantarawichai, 44150 Maha Sarakham, Thailand;5. Chongqing Institute of Geological Survey, 401122 Chongqing, China;1. Palaeoanthropology, Senckenberg Centre for Human Evolution and Palaeoenvironment, Eberhard Karls University of Tübingen, Rümelinstr. 23, 72070 Tübingen, Germany;2. Laboratory of Geology and Palaeontology, Department of Geology, Aristotle University, 54124 Thessaloniki, Greece;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;1. Natural Sciences Museum Piatra Neam?, Petru Rare? No. 26, 610119 Piatra Neam?, Romania;2. Institute of Geology of the Czech Academy of Sciences, Rozvojová 269, 16500 Prague 6, Czech Republic;3. “Alexandru Ioan Cuza” University of Ia?i, Department of Geology, 20A Carol I Blv, 700505 Ia?i, Romania;4. Dipartimento di Scienze della Terra, Università degli Studi di Torino, Via Valperga Caluso, 35, 10125 Torino, Italy;5. Institute of Geology and Palaeontology, Charles University, Albertov 6, 12843 Prague 2, Czech Republic;1. Laboratoire de Géologie de Lyon: Terre, Planète, Environnement, UMR CNRS 5276 (CNRS, ENS, Université Lyon1), Ecole Normale Supérieure de Lyon, 69364, Lyon cedex 07, France;2. La Plage aux ptérosaures, Le Mas de Pégourdy, 46150, Crayssac, France |
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| Abstract: | A new crocodylomorph tooth assemblage from the Lower Member of the Douiret Formation (uppermost Jurassic–lowermost Cretaceous) in southeastern Tunisia is described. These teeth have been grouped into five morphotypes based on their diagnostic morphological features. The sample includes teeth, which have not been reported until now, such as non-Machimosaurini teleosauroid teeth, and labiolingually compressed tooth crowns with cutting edges devoid of serrations. Certain minor morphometric differences have been interpreted as ontogenetic or being possibly related to the position of the teeth in the jaws. Three trophic entities have subsequently been defined on the basis of the morphological characteristics of the teeth, and a possible niche partitioning between at least three crocodylomorph taxa is highlighted for the first time in the Tataouine Basin. On the other hand, the stratigraphic context of the Douiret Formation is thoroughly discussed in order to show how stratigraphic uncertainties could significantly impact previous attempts at reconstructing the macroevolutionary history of Crocodylomorpha. The latter should be treated with caution when the stratigraphic context of the fossil bearing formation remains a subject of debate. |
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| Keywords: | Tooth assemblage Crocodylomorphs Stratigraphic uncertainties Douiret Formation Tunisia Dents Crocodylomorphes Problème stratigraphique Formation Douiret Tunisie |
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