A reassessment of Kelmayisaurus petrolicus, a large theropod dinosaur from the Early Cretaceous of China

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	A reassessment of Kelmayisaurus petrolicus, a large theropod dinosaur from the Early Cretaceous of China
	Brusatte, Stephen L.1,2; Benson, Roger B. J.3,4; Xu, Xing 5; sbrusatte@amnh.org
	2012-03-01
发表期刊	ACTA PALAEONTOLOGICA POLONICA
ISSN	0567-7920
卷号	57 期号:1 页码:65-72
文章类型	Article
摘要	The Early Cretaceous fossil record of large-bodied theropods from Asia is poor, hindering comparison of Asian predatory dinosaur faunas with those from other continents. One of the few large Asian theropod specimens from this interval is a partial skull (maxilla and dentary) from the Lianmugin Formation (?Valanginian-Albian), the holotype of Kelmayisaurus petrolicus. Most authors have either considered this specimen as an indeterminate basal tetanuran or a nomen dubium. We redescribe K. petrolicus and note that it possesses a single autapomorphy (a deep accessory groove on the lateral surface of the anterior dentary), as well as a unique combination of characters that differentiates it from other theropods, affirming its validity. A phylogenetic analysis recovers K. petrolicus as a basal carcharodontosaurid, which is supported by various features: very deep interdental plates (a carcharodontosaurid synapomorphy), fused interdental plates (present in carchardontosaurids and a limited number of other theropods), and the absence of diagnostic features of other clades of large-bodied theropods such as abelisaurids, megalosauroids, and coelurosaurs. As such, Kelmayisaurus is the second known carcharodontosaurid from Asia, and further evidence that this clade represented a global radiation of large-bodied predators during the Early-mid Cretaceous.
关键词	Dinosauria Theropoda Carcharodontosauridae Anatomy Cretaceous China
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
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关键词[WOS]	MEGALOSAURUS-BUCKLANDII DINOSAURIA ; REPUBLIC-OF-CHINA ; CARCHARODONTOSAURID DINOSAURIA ; PHYLOGENY ; PATAGONIA ; EVOLUTION ; XINJIANG ; ANATOMY ; ASIA ; TYRANNOSAURIDS
收录类别	SCI
语种	英语
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:000302518800005
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4317
专题	古低等脊椎动物研究室
通讯作者	sbrusatte@amnh.org
作者单位	1.Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA 2.Columbia Univ, Dept Earth & Environm Sci, New York, NY USA 3.UCL, Dept Earth Sci, London WC1E 6BT, England 4.Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England 5.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Brusatte, Stephen L.,Benson, Roger B. J.,Xu, Xing,et al. A reassessment of Kelmayisaurus petrolicus, a large theropod dinosaur from the Early Cretaceous of China[J]. ACTA PALAEONTOLOGICA POLONICA,2012,57(1):65-72.
APA	Brusatte, Stephen L.,Benson, Roger B. J.,Xu, Xing,&sbrusatte@amnh.org.(2012).A reassessment of Kelmayisaurus petrolicus, a large theropod dinosaur from the Early Cretaceous of China.ACTA PALAEONTOLOGICA POLONICA,57(1),65-72.
MLA	Brusatte, Stephen L.,et al."A reassessment of Kelmayisaurus petrolicus, a large theropod dinosaur from the Early Cretaceous of China".ACTA PALAEONTOLOGICA POLONICA 57.1(2012):65-72.

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