Late Triassic sauropodomorph and Middle Jurassic theropod tracks from the Xichang Basin,Sichuan Province,southwestern China:First report of the ichnogenus Carmelopodus

作     者：Li-Da Xing Jin Ba Martin G.Lockley Hendrik Klein 5heng-Wu Yon Anthony Romilio Chun-Yong Chou Vtl.Scott Persons IV 

作者机构：State Key Laboratory of Biogeology and Environmental GeologyChina University of GeosciencesBeijing 100083China School of Earth Sciences and ResourcesChina University of GeosciencesBeijing 100083China State Key Laboratory of Palaeobiology and StratigraphyNanjing Institute of Geology and Palaeontology Chinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina Sichuan Institute of Geological SurveyChengdu 610081Sichuan ProvinceChina Dinosaur Trackers Research GroupUniversity of Colorado DenverPO Box 173364DenverCO 80217USA Saurierwelt Palaontologisches MuseumAlteRicht 7D-92318NeumarktGermany School of Biological SciencesThe University of QueenslandBrisbaneQueensland 4072Australia Department of Biological SciencesUniversity of Alberta116St &85AveEdmonton AB T6G 2R3Alberta Canada 

出 版 物：《Journal of Palaeogeography》 (古地理学报（英文版）)

年 卷 期：2018年第7卷第1期

页      面：1-13页

核心收录：

学科分类：07[理学] 

基　　金：supported by the National Natural Science Foundation of China (Grant No.41772008) the State Key Laboratory of Palaeobiology and Stratigraphy(Nanjing Institute of Geology and Palaeontology, CAS)(Grant No.173127) and the comprehensive geological and mineral survey in Wumeng mountainous area conducted by China Geological Survey (Grant No.121201010000150002) 

主　　题：Sauropodomorph Theropod Footprint Ichnofossil Upper Triassic Xujiahe Formation Middle Jurassic Shaximiao Formation Xichang Basin Sichuan Province 

摘      要：Upper Triassic and Middle Jurassic strata of the Xichang Basin in Sichuan Province, southwestern China, yielded important dinosaur ichnofossils. From the Xujiahe Formation of the Yiguojiao tracksite, we report a Late Triassic footprint assemblage in China and the first discovery of diagnostic Triassic sauropodomorph tracks in this region. The tracks share a number of features in common with the ichnogenera Eosauropus(Late Triassic) and Liujianpus(Early Jurassic). The neighboring Bingtu tracksite is stratigraphically younger(Shaximiao Formation, Middle Jurassic) and preserves small tridactyl theropod tracks that represent the first occurrence of the ichnotaxon Carmelopodus in China and Asia. While these tracks are morphologically comparable to those from the Middle Jurassic type locality in North America, the specimens from China show the proximal margin of the digit IV impression in a more cranial position, which may indicate a trackmaker with a relatively short metatarsal IV. In addition to the skeletal record, the Carmelopodus footprints document the presence of small theropods in the dinosaur fauna of the Middle Jurassic Shaximiao Formation.