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DOI	10.7717/peerj.14982
	A new juvenile sauropod specimen from the Middle Jurassic Dongdaqiao Formation of East Tibet
	An, Xianyin; Xu, Xing; Han, Fenglu; Sullivan, Corwin; Wang, Qiyu; Li, Yong; Wang, Dongbing; Wang, Baodi; Hu, Jinfeng
发表日期	2023
ISSN	2167-8359
卷号	11
英文摘要	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
英文关键词	PHYLOGENETIC-RELATIONSHIPS; DINOSAURIA SAUROPODA; YUNNAN PROVINCE; ANATOMY; REASSESSMENT; OSTEOLOGY
WOS研究方向	Multidisciplinary Sciences
WOS记录号	WOS:000980425000002
来源期刊	PEERJ
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282580
作者单位	China Geological Survey; Chengdu Center, China Geological Survey; Yunnan University; Chinese Academy of Sciences; Institute of Vertebrate Paleontology & Paleoanthropology, CAS; China University of Geosciences - Wuhan; University of Alberta
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],2023,11.
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.
MLA	An, Xianyin,et al."A new juvenile sauropod specimen from the Middle Jurassic Dongdaqiao Formation of East Tibet".PEERJ 11(2023).