The tetrapod fauna of the upper Permian Naobaogou Formation of China: 10 Jimusaria monanensis sp. nov. (Dicynodontia) shows a unique epipterygoid .

doi:10.7717/peerj.15783

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	The tetrapod fauna of the upper Permian Naobaogou Formation of China: 10 Jimusaria monanensis sp. nov. (Dicynodontia) shows a unique epipterygoid .
	Shi, Yu -Tai 1,2; Liu, Jun1,2
	2023-07-31
发表期刊	PEERJ
ISSN	2167-8359
卷号	11 期号:Part 2 页码:22
摘要	Jimusaria is the first reported Chinese dicynodont, previously only known from Xinjiang. Here we refer two specimens from the Naobaogou Formation, Nei Mongol, China to Jimusaria based on the following features: squamosal separated from supraoccipital by tabular, tabular contacting opisthotic, sharp and thin lateral dentary shelf expanding anteriorly into a thick swelling, nasals fused as single element, rod-like medial bar formed by footplate of epipterygoid connecting to the parabasisphenoid and periotic medially. A new species, J. monanensis, is named based on the diagnostic characters on these two specimens such as distinct caniniform buttress lacking posteroventral furrow, naso-frontal suture forming an anterior directed sharp angle, and converging ventral ridges on posterior portion of anterior pterygoid rami. In Jimusaria, the epipterygoid posteromedially contacts the parabasisphenoid and the periotic as a rod-like bar, a unique morphology unknown in any other dicynodonts. This structure probably increases the stability of the palatal complex. A similar structure might also appear in other dicynodonts as a cartilage connection. The new occurrence of Jimusaria increases the diversity of the tetrapod assemblage from the Naobaogou Formation, and further strengthens the connection between the tetrapod faunas from Nei Mongol and Xinjiang. Based on the current record, Jimusaria is one of the few tetrapod genera which survived in the end-Permian mass extinction.
关键词	Dicynodontia Dicynodontoidea Jimusaria Lopingian Naobaogou formation Epipterygoid
DOI	10.7717/peerj.15783
关键词[WOS]	THERAPSIDA
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000]
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001043319700001
出版者	PEERJ INC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/22808
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Liu, Jun
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Shi, Yu -Tai,Liu, Jun. The tetrapod fauna of the upper Permian Naobaogou Formation of China: 10 Jimusaria monanensis sp. nov. (Dicynodontia) shows a unique epipterygoid .[J]. PEERJ,2023,11(Part 2):22.
APA	Shi, Yu -Tai,&Liu, Jun.(2023).The tetrapod fauna of the upper Permian Naobaogou Formation of China: 10 Jimusaria monanensis sp. nov. (Dicynodontia) shows a unique epipterygoid ..PEERJ,11(Part 2),22.
MLA	Shi, Yu -Tai,et al."The tetrapod fauna of the upper Permian Naobaogou Formation of China: 10 Jimusaria monanensis sp. nov. (Dicynodontia) shows a unique epipterygoid .".PEERJ 11.Part 2(2023):22.

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