JIANG Shan
1 Natural History Museum of Guangxi, Nanning, Guangxi 530012, ChinaJI Shu-an
2 Institute of Geology, Chinese Academy of Geological Sciences; Key Laboratory of Stratigraphy and Paleontology, Ministry of Land and Resources; Beijing 100037, ChinaMO Jinyou
1 Natural History Museum of Guangxi, Nanning, Guangxi 530012, ChinaMany thanks are given to Prof. Liu Yongqing, Prof. Li Daqing, and Guo Xiangqi, Peng Nan, Xue Peilin for their help in the field; to Mr. Cui Guihai for skillful preparation specimens and Prof. Liu Jun for his comments and improvement on the manuscript. This research was funded by the China Geological Survey (Grant No. 1212011120139).
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.
JIANG Shan, JI Shu-an, MO Jinyou.2017. First record of Bystrowianid Chroniosuchians (Amphibia: Anthracosauromorpha) from the Middle Permian of China[J]. Acta Geologica Sinica(),91(5):1523-1529
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