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Dental anatomy of the apex predator Sinraptor dongi (Theropoda: Allosauroidea) from the Late Jurassic of China

文献类型：期刊论文

作者Hendrickx, Christophe2,8; Stiegler, Josef3; Currie, Philip J.4; Han, Fenglu5; Xu, Xing6,7; Choiniere, Jonah N.2; Wu, Xiao-Chun1
刊名CANADIAN JOURNAL OF EARTH SCIENCES
出版日期2020-09-01
卷号57期号:9页码:1127-1147
关键词tooth crown denticle dinosaur theropod
ISSN号0008-4077
DOI10.1139/cjes-2019-0231
通讯作者Hendrickx, Christophe(christophendrickx@gmail.com)
英文摘要The dental morphology of the holotype of the theropod Sinraptor dongi from the Jurassic Shishugou Formation of China is comprehensively described. We highlight a combination of dental features that appear to be restricted to Sinraptor: (i) crowns with denticulated mesial and distal carinae extending from the root and an irregular surface texture on the enamel; (ii) a D- to salinon-shaped cross-sectional outline at the crown base in mesialmost teeth; (iii) mesial crowns with mesial carinae spiraling mesiolingually and lingually positioned longitudinal groove adjacent to the mesial carina; and (iv) particularly labio-lingually compressed lateral teeth with weakly labially deflected distal carinae, flat to concave basocentral surfaces of the labial margins of the crowns, and horizontally elongated distal denticles showing short to well-developed interdenticular sulci. Using cladistic, multivariate, discriminant, and cluster analyses, we demonstrate that the dentition of Sinraptor is relatively similar to that of ceratosaurids, megalosauroids, and other allosauroids and is particularly close to that of Allosaurus. The dental anatomy of Sinraptor and Allosaurus, which differs mainly in the labiolingual compression of the lateral crowns and in the number of premaxillary teeth, shows adaptations towards a predatory lifestyle, including premaxillary teeth capable of enduring tooth-tobone contact and crowns with widely separated mesial and distal carinae capable of inflicting widely open wounds.
WOS关键词MAJUNGASAURUS-CRENATISSIMUS THEROPODA ; CANADIAN DINOSAUR PROJECT ; SHISHUGOU FORMATION ; ALBERTOSAURUS-SARCOPHAGUS ; TYRANNOSAURUS-REX ; TEETH ; XINJIANG ; ABELISAURIDAE ; IDENTIFICATION ; HETERODONTY
资助项目University Research Committee of the University of the Witwatersrand ; National Science Foundation East Asia and Pacific Summer Institutes Office of International Science and Engineering[1311000]
WOS研究方向Geology
语种英语
WOS记录号WOS:000563781400007
出版者CANADIAN SCIENCE PUBLISHING
资助机构University Research Committee of the University of the Witwatersrand ; National Science Foundation East Asia and Pacific Summer Institutes Office of International Science and Engineering
源URL[http://119.78.100.205/handle/311034/18000]  
专题中国科学院古脊椎动物与古人类研究所
通讯作者Hendrickx, Christophe
作者单位1.Canadian Museum Nat, POB 3443, Ottawa, ON K1P 6P4, Canada
2.Univ Witwatersrand, Evolutionary Studies Inst, Private Bag 3, ZA-2050 Johannesburg, South Africa
3.George Washington Univ, Dept Biol Sci, Washington, DC 20052 USA
4.Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, Canada
5.China Univ Geosci, Sch Earth Sci, Wuhan, Peoples R China
6.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, 142 Xiwai St, Beijing 100044, Peoples R China
7.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, 142 Xiwai St, Beijing 100044, Peoples R China
8.CONICET Fdn Miguel Lillo, Unidad Ejecutora Lillo, Miguel Lillo 251, RA-4000 San Miguel De Tucuman, Tucuman, Argentina
推荐引用方式
GB/T 7714		 Hendrickx, Christophe,Stiegler, Josef,Currie, Philip J.,et al. Dental anatomy of the apex predator Sinraptor dongi (Theropoda: Allosauroidea) from the Late Jurassic of China[J]. CANADIAN JOURNAL OF EARTH SCIENCES,2020,57(9):1127-1147.
APA Hendrickx, Christophe.,Stiegler, Josef.,Currie, Philip J..,Han, Fenglu.,Xu, Xing.,...&Wu, Xiao-Chun.(2020).Dental anatomy of the apex predator Sinraptor dongi (Theropoda: Allosauroidea) from the Late Jurassic of China.CANADIAN JOURNAL OF EARTH SCIENCES,57(9),1127-1147.
MLA Hendrickx, Christophe,et al."Dental anatomy of the apex predator Sinraptor dongi (Theropoda: Allosauroidea) from the Late Jurassic of China".CANADIAN JOURNAL OF EARTH SCIENCES 57.9(2020):1127-1147.

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