A new metriacanthosaurid theropod dinosaur from the Middle Jurassic of Yunnan Province, China

doi:10.7717/peerj.19218

IVPP-IR

	A new metriacanthosaurid theropod dinosaur from the Middle Jurassic of Yunnan Province, China
	Zou, Yi 1,2; Chen, Li 3; Wang, Tao 4; Wang, Guo-Fu 3; Zhang, Wei-Gang 5; Zhang, Xiao-Qin 6; Wang, Zhen-Ji 6; Wu, Xiao-Chun7 ; You, Hai-Lu1,2
	2025-04-02
发表期刊	PEERJ
ISSN	2167-8359
卷号	13 页码:54
通讯作者	You, Hai-Lu(youhailu@ivpp.ac.cn)
摘要	Metriacanthosaurid theropods represent a basal-branching lineage of tetanurans. Members of this clade are mainly medium to large-sized and lived in Laurasia during the Middle Jurassic to the Early Cretaceous. In this clade, Sinraptor dongi, Sinraptor hepingensis, and Yangchuanosarus shangyouensis from the Late Jurassic are well represented by the nearly complete specimens, but the incompleteness of Middle Jurassic taxa hinders our knowledge of the origin and early evolution of Metriacanthosauridae. This paper describes a new genus and species of metriacanthosaurids, Yuanmouraptor jinshajiangensis gen. et sp. nov, from the Middle Jurassic Zhanghe Formation of Yunnan Province, China. The new taxon is represented by a cranium and the anterior section of the vertebral column including the complete cervical series and the first dorsal vertebra. Yuanmouraptor jinshajiangensis can be diagnosed based on the following autapomorphies: the anterior process of postorbital sheet-shaped and keeping consistent depth; ventral ramus of postorbital bearing a laterally twisted trough running along its lateral surface; ventral surface of axial intercentrum parallel with that of axial centrum; discontinuity of inclination on anterodorsal margin of the third and fourth cervical vertebrae; strongly posteriorly elongated epipophyses of anterior cervical vertebrae; deeply excavated pneumatic foramina on the third cervical vertebra; sheet-shaped and subrectangular neural spines of posterior cervical vertebrae. Phylogenetic analysis recovers Yuanmouraptor as the most basal-branching member within Metriacanthosauridae and provides a new alternative phylogenetic topology of non-coelurosaurian tetanurans.
关键词	Metriacanthosauridae Theropod Middle Jurassic Yunnan Province
DOI	10.7717/peerj.19218
关键词[WOS]	MAJUNGASAURUS-CRENATISSIMUS THEROPODA ; CONCAVENATOR-CORCOVATUS THEROPODA ; CARCHARODONTOSAURID DINOSAURIA ; OSTEOLOGY ; PHYLOGENY ; EVOLUTION ; ABELISAURIDAE ; BRAINCASE ; PATAGONIA ; XINJIANG
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China
项目资助者	National Natural Science Foundation of China
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001477690400001
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/311034/24750
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	You, Hai-Lu
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 3.Chuxiong Prefectural Museum, Chuxiong, Peoples R China 4.Bur Nat Resources Lufeng City, Ctr Dinosaur Res & Protect, Lufeng, Peoples R China 5.Chuxiong Jurass Cultural Tourism Ind Pk Dev Co Ltd, Chuxiong, Peoples R China 6.Chuxiong Normal Univ, Chuxiong, Peoples R China 7.Canadian Museum Nat, Ottawa, ON, Canada
推荐引用方式 GB/T 7714	Zou, Yi,Chen, Li,Wang, Tao,et al. A new metriacanthosaurid theropod dinosaur from the Middle Jurassic of Yunnan Province, China[J]. PEERJ,2025,13:54.
APA	Zou, Yi.,Chen, Li.,Wang, Tao.,Wang, Guo-Fu.,Zhang, Wei-Gang.,...&You, Hai-Lu.(2025).A new metriacanthosaurid theropod dinosaur from the Middle Jurassic of Yunnan Province, China.PEERJ,13,54.
MLA	Zou, Yi,et al."A new metriacanthosaurid theropod dinosaur from the Middle Jurassic of Yunnan Province, China".PEERJ 13(2025):54.