A new juvenile sauropod specimen from the Middle Jurassic Dongdaqiao Formation of East Tibet

doi:10.7717/peerj.14982

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	A new juvenile sauropod specimen from the Middle Jurassic Dongdaqiao Formation of East Tibet
	An, Xianyin 1; Xu, Xing2,3 ; Han, Fenglu4 ; Sullivan, Corwin 5,6; Wang, Qiyu 1; Li, Yong 1; Wang, Dongbing 1; Wang, Baodi 1; Hu, Jinfeng 4
	2023-03-22
发表期刊	PEERJ
ISSN	2167-8359
卷号	11 期号:0 页码:23
摘要	Jurassic strata are widely distributed in the eastern part of Tibet Autonomous Region, and have yielded many dinosaur bones. However, none of these specimens has been studied extensively, and some remain unprepared. Here we provide a detailed description of some new sauropod material, including several cervical vertebrae and a nearly complete scapula, recovered from the Middle Jurassic of Chaya County, East Tibet. The cervical vertebrae have short centra that bear ventral midline keels, as in many non-neosauropod sauropods such as Shunosaurus. Moreover, the cervical centra display deep lateral excavations, partitioned by a septum. The scapula has proximal and distal ends that are both expanded as in mamenchisaurids and neosauropods. However, relatively small body size and lack of fusion of neurocentral sutures in the cervical vertebrae suggest that the available material is from a juvenile, and the length of the cervical centra may have increased relative to the size of the rest of the skeleton in later ontogenetic stages. Phylogenetic analysis provides limited evidence that the new Tibetan sauropod specimen belongs to Eusauropoda, being more derived than Shunosaurus, but is basal to Mamenchisauridae. The new material provides important information on the morphological transition between Shunosaurus and mamenchisaurids, and extends the known biogeographic range of early-diverging sauropods in the Middle Jurassic of East Asia.
关键词	Middle Jurassic Tibet Sauropoda
DOI	10.7717/peerj.14982
关键词[WOS]	PHYLOGENETIC-RELATIONSHIPS ; DINOSAURIA SAUROPODA ; YUNNAN PROVINCE ; ANATOMY ; REASSESSMENT ; OSTEOLOGY
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000980425000002
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/311034/22477
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Han, Fenglu
作者单位	1.Chengdu Ctr China Geol Survey, Chengdu, Sichuan, Peoples R China 2.Yunnan Univ, Centre Vertebrate Evolutionary Biol, Kunming, Yunnan, Peoples R China 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 4.China Univ Geosci Wuhan, Sch Earth Sci, Wuhan, Hubei, Peoples R China 5.Univ Alberta, Dept Biol Sci, Edmonton, AB, Canada 6.Philip J Currie Dinosaur Museum, Wembley, AB, Canada
推荐引用方式 GB/T 7714	An, Xianyin,Xu, Xing,Han, Fenglu,et al. A new juvenile sauropod specimen from the Middle Jurassic Dongdaqiao Formation of East Tibet[J]. PEERJ,2023,11(0):23.
APA	An, Xianyin.,Xu, Xing.,Han, Fenglu.,Sullivan, Corwin.,Wang, Qiyu.,...&Hu, Jinfeng.(2023).A new juvenile sauropod specimen from the Middle Jurassic Dongdaqiao Formation of East Tibet.PEERJ,11(0),23.
MLA	An, Xianyin,et al."A new juvenile sauropod specimen from the Middle Jurassic Dongdaqiao Formation of East Tibet".PEERJ 11.0(2023):23.

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