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

doi:10.1139/cjes-2019-0231

	Dental anatomy of the apex predator Sinraptor dongi (Theropoda: Allosauroidea) from the Late Jurassic of China
	Hendrickx, Christophe 2,8; Stiegler, Josef 3; Currie, Philip J.4; Han, Fenglu 5; Xu, Xing 6,7; Choiniere, Jonah N.2; Wu, Xiao-Chun 1
刊名	CANADIAN JOURNAL OF EARTH SCIENCES
	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
DOI	10.1139/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.
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关键词	MAJUNGASAURUS-CRENATISSIMUS THEROPODA ; CANADIAN DINOSAUR PROJECT ; SHISHUGOU FORMATION ; ALBERTOSAURUS-SARCOPHAGUS ; TYRANNOSAURUS-REX ; TEETH ; XINJIANG ; ABELISAURIDAE ; IDENTIFICATION ; HETERODONTY
WOS研究方向	Geology
语种	英语
出版者	CANADIAN SCIENCE PUBLISHING
WOS记录号	WOS:000563781400007
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
内容类型	期刊论文
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.