Turtle remains from the Middle Jurassic Xintiangou Formation of Yunyang,Sichuan Basin,China |
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| Affiliation: | 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. Centre de Paléontologie de Paris (CR2P), Muséum national d’Histoire naturelle, Sorbonne Université, 8, rue Buffon, 75005 Paris CP 43, France;2. Naturalis Biodiversity Center, P.O. Box 9517, 2300 RA Leiden, The Netherlands;3. Instituto Dom Luiz da Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal;4. International Health Centres, Av. Infante de Henrique 7, Areias São João, 8200 Albufeira, Portugal;1. School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;2. Dinosaur Tracks Museum, University of Colorado Denver, PO Box 173364, Denver CO 80217, USA;3. Regional Geological Survey Team, Sichuan Bureau of Geological Exploration and Development of Mineral Resources, Chengdu, China;4. Peace Region Palaeontology Research Centre, Box 1540, Tumbler Ridge, British Columbia V0C 2W0, Canada;5. Saurierwelt Paläontologisches Museum, Alte Richt 7, D-92318 Neumarkt, Germany;6. Department of Biological Sciences, University of Alberta 11455 Saskatchewan Drive, Edmonton, Alberta T6G 2E9, Canada;7. No.208 Hydrogeological and Engineering Geological Team, Chongqing Bureau of Geological and Mineral Resource Exploration and Development, Chongqing 400700, 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. Laboratoire de Géologie de Lyon : Terre, Planète et Environnement, UMR CNRS 5276 (CNRS, ENS, Université Lyon 1), École Normale Supérieure de Lyon, 69364 Lyon cedex 07, France;2. Palaeontological Research and Education Centre, Mahasarakham University, 44150 Khamrieng, Thailand;3. Laboratoire de Géologie de l’Ecole Normale Supérieure, CNRS (UMR 8538), 24 rue Lhomond, 75231 Paris cedex 05, France;1. School of the Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, China;2. Regional Geological Survey Team, Sichuan Bureau of Geological Exploration and Development of Mineral Resources, Chengdu, China;3. Dinosaur Tracks Museum, University of Colorado Denver, PO Box 173364, Denver, CO, 80217, USA;4. Saurierwelt Paläontologisches Museum, Alte Richt 7, D-92318, Neumarkt, Germany;5. Department of Biological Sciences, University of Alberta, 11455 Saskatchewan Drive, Edmonton, Alberta, T6G 2E9, Canada |
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| Abstract: | Three turtle shells from the Middle Jurassic Xintiangou Formation of Yunyang (Chongqing, China) are described and assigned to Xinjiangchelyidae (Testudines: Eucryptodira). This is the first report of turtle remains from the Xintiangou Formation, Sichuan Basin and represents the oldest known Xinjiangchelyidae. The assemblage includes two taxa, Protoxinjiangchelys sp. and Xinjiangchelyidae indet. This discovery extends the stratigraphical distribution of Xinjiangchelyidae and improves our knowledge about the early evolution of that family. It demonstrates that by the Middle Jurassic, at the time of deposition of the Xintiangou Formation, the group was already diversified in the Sichuan Basin. |
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| Keywords: | Testudines Xinjiangchelyidae Middle Jurassic Xintiangou Formation Sichuan Basin China Testudines Xinjiangchelyidae Jurassique moyen Formation Xintiangou Bassin du Sichuan Chine |
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