First record of Bystrowianid Chroniosuchians
(Amphibia: Anthracosauromorpha) from the Middle Permian of China |
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Authors: | JIANG Shan JI Shu-an and MO Jinyou |
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Institution: | 1 Natural History Museum of Guangxi, Nanning, Guangxi 530012, China,2 Institute of Geology, Chinese Academy of Geological Sciences; Key Laboratory of Stratigraphy and Paleontology, Ministry of Land and Resources; Beijing 100037, China and 1 Natural History Museum of Guangxi, Nanning, Guangxi 530012, China |
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Abstract: | Chroniosuchians are basal tetrapods owing to Anthracosauromorpha and the oldest species of chroniosuchians have been recorded in the Late Permian of Russia so far. In this study, we present evidence for their existence in the Middle Permian of China, based on well preserved diagnostic vertebrae with associated osteoderms from the Dashankou fanua in northwestern China. The finds clearly show interosteoderm articulation pattern between the adjacent scutes in bystrowianids. The features observed in Yumenerpeton yangi may warrant the close proximity or phyletic succession of the chroniosuchid and bystrowianid types of the osteoderm design. |
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Keywords: | Bystrowianidae Chroniosuchia osteoderms Middle Permian China |
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