A new possible megalosauroid theropod from the Middle Jurassic Xintiangou Formation of Chongqing, People's Republic of China and its implication for early tetanuran evolution

doi:10.1038/s41598-019-56959-x

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	A new possible megalosauroid theropod from the Middle Jurassic Xintiangou Formation of Chongqing, People's Republic of China and its implication for early tetanuran evolution
	Dai, Hui 2; Benson, Roger 6; Hu, Xufeng 2; Ma, Qingyu 2; Tan, Chao 2; Li, Ning 2; Xiao, Ming 2; Hu, Haiqian 2; Zhou, Yuxuan 2; Wei, Zhaoying 2
刊名	SCIENTIFIC REPORTS
	2020-01-10
卷号	10 期号:1 页码:16
ISSN号	2045-2322
DOI	10.1038/s41598-019-56959-x
通讯作者	Dai, Hui(dhui6251@qq.com) ; Xu, Xing(xu.xing@ivpp.ac.cn)
英文摘要	Tetanurae is a special group of theropod dinosaurs that originated by the late Early Jurassic. It includes several early-diverging groups of generally large-bodied predators (megalosauroids, allosauroids, tyrannosauroid coelurosaurs) as well as morphologically disparate small-bodied coelurosaurs, including birds. Aspects of the evolutionary history of tetanurans remain contested, including the topology of their deep phylogenetic divergences (among Megalosauroidea, Allosauroidea and Coelurosauria). We report a new theropod, Yunyangosaurus puanensis gen. et sp. nov., based on a fragmentary specimen recovered from the Middle Jurassic Xintiangou Formation of Chongqing, southwestern China. It shares several features uniquely with some megalosauroids (the clade of megalosaurids + spinosaurids + piatnitzkysaurids), such as prominent rims around the anterior articular surfaces of cervical centra and bifurcated anterior dorsal neural spines (present in piatnitzkysaurids). Nevertheless, it also shows several features that are rare or absent among megalosauroids and more crownward tetanurans, including prominent spinopostyzgopophyseal laminae (also present in non-tetanurans and metriacanthosaurid allosauroids), flat anterior articular surfaces of the cervical centra (also present in piatnitzkysaurids and some earlier-diverging tetanurans), and the presence of a posterior pneumatic foramen or fossa (absent in most tetanurans, but sporadically present in some cervical vertebrae of piatnitzkysaurids). Yunyangosaurus therefore presents a combination of derived and apparently primitive character states that are not seen in other theropods. This suggests that patterns of morphological evolution associated with deep tetanuran divergences were more complex than currently recognized, with implications for understanding the character evolution in theropods.
资助项目	Natural Science Foundation of Chongqing, China[cstc2018jcyjAX0435] ; Postdoctoral Project of Chongqing, China[Xm2017069] ; Project of Dinosaur Fossil Protection and Research of Chongqing Planning and Natural Resources Bureau[kj-2018035] ; National Natural Science Foundation of China[41688103]
WOS关键词	DINOSAURIA ; CARNOSAUR ; XINJIANG ; SICHUAN
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000551344900003
资助机构	Natural Science Foundation of Chongqing, China ; Postdoctoral Project of Chongqing, China ; Project of Dinosaur Fossil Protection and Research of Chongqing Planning and Natural Resources Bureau ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/16604]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Dai, Hui; Xu, Xing
作者单位	1.Chongqing Inst Geol Survey, Chongqing 401122, Peoples R China 2.Chongqing Bur Geol & Mineral Resource Explorat &, 208 Hydrogeol & Engn GeologicalTeam, Chongqing Lab Geoheritage Protect & Res, Chongqing 400700, Peoples R China 3.Zigong Dinosaur Museum, Zigong 643013, Sichuan, Peoples R China 4.CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China 5.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 6.Univ Oxford, Dept Earth Sci, Oxford OX1 3AN, England
推荐引用方式 GB/T 7714	Dai, Hui,Benson, Roger,Hu, Xufeng,et al. A new possible megalosauroid theropod from the Middle Jurassic Xintiangou Formation of Chongqing, People's Republic of China and its implication for early tetanuran evolution[J]. SCIENTIFIC REPORTS,2020,10(1):16.
APA	Dai, Hui.,Benson, Roger.,Hu, Xufeng.,Ma, Qingyu.,Tan, Chao.,...&Xu, Xing.(2020).A new possible megalosauroid theropod from the Middle Jurassic Xintiangou Formation of Chongqing, People's Republic of China and its implication for early tetanuran evolution.SCIENTIFIC REPORTS,10(1),16.
MLA	Dai, Hui,et al."A new possible megalosauroid theropod from the Middle Jurassic Xintiangou Formation of Chongqing, People's Republic of China and its implication for early tetanuran evolution".SCIENTIFIC REPORTS 10.1(2020):16.