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A New Troodontid Dinosaur from the lower Cretaceous Yixian Formation of liaoning Province,China

Acta Geologica Sinica(English Edition) 2017年第3期91卷 763-780页

作者： SHEN Caizhi l Junchang lIU Sizhao Martin KUNDRT stephen l.brusatte GAO Hailong Institute of Geology Chinese Academy of Geological Sciences Dalian Natural History Museum Department of Ecology Faculty of Natural SciencesComenius University Center for Interdisciplinary Biosciences Faculty of ScienceUniversity of Pavol Jozef afárik University of Edinburgh School of GeoSciences Institute of Geomechanics Chinese Academy of Geological Sciences

A new troodontid dinosaur, Daliansaurus liaoningensis gen. et sp. nov., is erected based on a nearly complete specimen from the lower Cretaceous Yixian Formation of Beipiao City, liaoning Province, China. This well preserved skeleton provides important new details of the anatomy for liaoning troodontids, and gives new insight into their phylogenetic relationships and evolution. Daliansaurus is distinguished from other troodontids by an enlarged ungual on pedal digit IV, which is approximately the same size as the sickle-shaped second ungual, and is differentiated from other liaoning troodontids by a number of characters of the skull, manus, pelvis, and hindlimb. A phylogenetic analysis recovers Daliansaurus within a subclade of liaoning troodontids that also includes Sinovenator, Sinusonasus, and Mel We erect a name for this group--Sinovenatorinae--and argue that it reflects a localized radiation of small-bodied troodontids in the Early Cretaceous of eastern Asia, similar to previously recognized radiations of liaoning dromaeosaurids and avialans. As more liaoning theropods are discovered, it is becoming apparent that small, feathered paravians were particularly diverse during the Early Cretaceous, and future work is needed to clarify how this diversity arose, which species coexisted, and how these numerous species partitioned niches.

关键词： Troodontids Daliansaurus liaoningensis Early Cretaceous Yixian Formation liaoning

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A probable tyrannosaurid track from the Upper Cretaceous of southern China

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Science Bulletin 2019年第16期64卷 1136-1139页

作者： lida Xing Kecheng Niu Martin G.lockley Hendrik Klein Anthony Romilio W.Scott Persons IV stephen l.brusatte State Key laboratory of Biogeology and Environmental Geology China University of GeosciencesBeijing 100083China School of the Earth Sciences and Resources China University of GeosciencesBeijing 100083China Yingliang Stone Nature History Museum Nan’an 362300China Dinosaur Trackers Research Group University of ColoradoDenver 80217USA Saurierwelt Palaontologisches Museum Neumarkt D-92318Germany School of Biological Sciences the University of QueenslandQueensland 4072Australia Mace Brown Museum of Natural History Department of Geology and Environmental GeosciencesCollege of CharlestonCharleston 29401USA School of GeoSciences Grant InstituteUniversity of EdinburghEdinburgh EH9 3FEUK

A large number of Upper Cretaceous(Maastrichtian)dinosaur skeletal fossils have been found in the Nanxiong Basin and adjacent Ganzhou area,including those of theropods,sauropods and ***,known dinosaur ichnoassemblages from the Nanxiong Basin partly indicate a different fauna,with dominating large-and medium-sized ornithopods,theropods,and pterosaurs(1,2)This is one of many known examples where trace and body fossil assemblages from the same formation or geologically discrete region show a different *** and paleobiogeographical analyses therefore should consider data from both,before any conclusions can be *** can be classified according to the relative degree of similarity or congruity(or difference/incongruity)between trace and body fossils into the 5 categories proposed by lockley[3].

关键词： tyrannosaurid track Upper Cretaceous southern China

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