The largest theropod track site in Yunnan, China: a footprint assemblage from the Lower Jurassic Fengjiahe Formation

doi:10.7717/peerj.11788

IVPP-IR > 中科院古脊椎所（2000年以后）

	The largest theropod track site in Yunnan, China: a footprint assemblage from the Lower Jurassic Fengjiahe Formation
	Li, Hongqing 1; Fabregues, Claire Peyre de 1; Bi, Shundong 1,2; Wang, Yi 3; Xu, Xing4,5
	2021-10-05
发表期刊	PEERJ
ISSN	2167-8359
卷号	9 期号:0 页码:32
摘要	Yunnan Province is famous for its diversified Lufeng vertebrate faunas containing many saurischian dinosaur remains. In addition to the body fossil record, dinosaur ichnofossils have also been discovered in Yunnan, and the number of published track sites is on the rise. We report a theropod assemblage from the Lower Jurassic Fengjiahe Formation in Xiyang, central Yunnan. It is the third report and description of dinosaur footprints from the Fengjiahe Formation, and this new track site is the largest in number of footprints for theropods in Yunnan. Over one hundred footprints are preserved on different layers of a claystone-dominated succession close to the Lower-Middle Jurassic boundary. The track area is referred to as a lacustrine shallow-water paleoenvironment. Tracks vary in size, morphology, and preservation. All are tridactyl and digitigrade, and some are identified as undertracks. The best preserved footprints were divided into three morphotypes: morphotype A ( 21 cm) resembling Grallator; morphotype B ( 27 cm-<30 cm) identified as Kayentapus xiaohebaensis; and morphotype C, an isolated footprint (39 cm) referred to the ichnogenus Kayentapus. Although footprint shape is influenced by many factors, biotic or abiotic, morphological differences among tracks such as size, divarication angles and proportions imply that at least three different kinds of theropods were visiting this site frequently. Theropod body fossils found in the surrounding area, such as Sinosaurus, turn out to be similar in body size to the projected size estimated from footprint lengths at the track site. In Yunnan, discoveries of theropod body fossils are rare. In that respect, the track record is a useful diversity indicator which can help to encompass theropod diversity patterns. Broadly speaking, large predators (five meters long or more) were uncommon in Early Jurassic ecosystems. Accordingly, large tracks are scarce on the track site, but not absent. Trackmakers of all sizes presumably coexisted in this tropical Jurassic ecosystem, and were regularly drawn to the track site in search of water or food resources.
关键词	Theropoda Grallator Kayentapus Jurassic Lower Jurassic Fengjiahe Yunnan China Ichnotaxonomy Tracks
DOI	10.7717/peerj.11788
关键词[WOS]	CHUANJIE FORMATION ; DINOSAUR TRACKS ; PROVINCE ; PRESERVATION ; SAUROPOD ; BASIN ; THERIZINOSAUR ; CONSISTENCY ; EUBRONTES ; BEHAVIOR
收录类别	SCI
语种	英语
资助项目	Yunnan University[2018FY001-005] ; China-Myanmar Joint Laboratory for Ecological and Environmental Conservation ; Yunnan Science & Technology Department[2018FY001-005]
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000707243100003
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/311034/18922
专题	中科院古脊椎所（2000年以后）
通讯作者	Fabregues, Claire Peyre de
作者单位	1.Yunnan Univ, Ctr Vertebrate Evolutionary Biol, Kunming, Yunnan, Peoples R China 2.Indiana Univ Penn, Dept Biol, Indiana, PA 15705 USA 3.Yuxi Museum, Yuxi, Yunnan, Peoples R China 4.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 5.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Li, Hongqing,Fabregues, Claire Peyre de,Bi, Shundong,et al. The largest theropod track site in Yunnan, China: a footprint assemblage from the Lower Jurassic Fengjiahe Formation[J]. PEERJ,2021,9(0):32.
APA	Li, Hongqing,Fabregues, Claire Peyre de,Bi, Shundong,Wang, Yi,&Xu, Xing.(2021).The largest theropod track site in Yunnan, China: a footprint assemblage from the Lower Jurassic Fengjiahe Formation.PEERJ,9(0),32.
MLA	Li, Hongqing,et al."The largest theropod track site in Yunnan, China: a footprint assemblage from the Lower Jurassic Fengjiahe Formation".PEERJ 9.0(2021):32.

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