Liu Jun, Abdala Fernando
Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China.
University of Chinese Academy of Sciences, Beijing, China.
PeerJ. 2017 Dec 6;5:e4150. doi: 10.7717/peerj.4150. eCollection 2017.
The Permian from China has a well-known terrestrial record where approximately 30 tetrapod taxa, including several therapsids, have been described. However, the record of therocephalians in China has remained elusive. gen. et sp. nov., discovered in the Member III of the Naobaogou Formation, Nei Mongol, China, is here described. This is the first therocephalian recovered from this fauna and only the second from the Permian of China. It is represented by a well-preserved robust snout of a medium-sized animal. This is the first akidnognathid reported from the Chinese Permian and only the second genus from Laurasia as one genus is known from Russia whereas the remaining members of the group are from the South African Karoo Basin. A phylogenetic analysis of therocephalians supports a basal position of within Akidnognathidae, followed by the Russian . Akidnognathidae is the latest major group of therocephalian appearing in the fossil record, and one of the few that does not have species from South Africa representing its most basal members.
中国二叠纪拥有著名的陆地化石记录，已描述了约30个四足动物类群，包括几种兽孔类动物。然而，中国兽头类动物的记录一直难以寻觅。本文描述了在中国内蒙古脑包沟组三段发现的新属新种。这是该动物群中首次发现的兽头类动物，也是中国二叠纪发现的第二个兽头类动物。它以一个保存完好的中型动物粗壮口鼻部为代表。这是中国二叠纪报道的首个阿氏兽科动物，也是劳亚大陆的第二个属，因为俄罗斯已知一个属，而该类群的其他成员都来自南非卡鲁盆地。对兽头类动物的系统发育分析支持该新属在阿氏兽科中处于基部位置，其次是俄罗斯的属。阿氏兽科是化石记录中出现的最新的主要兽头类动物类群，也是少数没有南非物种代表其最基部成员的类群之一。
