A re-evaluation of Chinshakiangosaurus chunghoensis Ye vide Dong 1992 (Dinosauria, Sauropodomorpha): implications for cranial evolution in basal sauropod dinosaurs

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	A re-evaluation of Chinshakiangosaurus chunghoensis Ye vide Dong 1992 (Dinosauria, Sauropodomorpha): implications for cranial evolution in basal sauropod dinosaurs
	Upchurch, Paul ; Barrett, Paul M.; Zhao Xijin ; Xu Xing; p.upchurch@ucl.ac.uk
	2007-03-01
发表期刊	GEOLOGICAL MAGAZINE
ISSN	0016-7568
卷号	144 期号:2 页码:247-262
文章类型	Article
摘要	Re-description of the left dentary of Chinshakiangosaurus chunghoensis reveals that it possesses an unusual combination of 'prosauropod' and 'sauropod' character states. Cladistic analysis places Chinshakiangosaurus as one of the most basal sauropods known currently. Mapping of dentary and dental characters onto the most parsimonious topologies yields insights into the sequence of acquisition of a number of feeding-related characters. For example, it seems that basal sauropodomorphs (traditional prosauropod taxa) possessed a fleshy cheek that attached to the mandible along a marked ridge, and that the same structure was present in the most basal sauropods. The early sauropod skull developed a lateral plate that reinforced the bases of the tooth crowns labially, and had wrinkled tooth enamel and a concavity on the mesial portion of the lingual part of each crown, while retaining a fleshy cheek and a relatively weak symphysis. More advanced sauropods (eusauropods) lost the cheek, perhaps in order to increase the gape of the jaws in response to a change in feeding style that involved collection of larger quantities of poor quality foliage.
关键词	Dentary Dinosauria Phylogeny Sauropoda Sauropodomorpha
WOS标题词	Science & Technology ; Physical Sciences
URL	查看原文
关键词[WOS]	PROSAUROPOD DINOSAURS ; MOROCCO ; CHINA ; DIET
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000245612400003
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4945
专题	中科院古脊椎所（2000年以后）古低等脊椎动物研究室
通讯作者	p.upchurch@ucl.ac.uk
作者单位	1.UCL, Dept Earth Sci, London WC1E 6BT, England 2.Nat Hist Museum, Dept Palaeontol, London SW7 5BD, England 3.Acad Sinica, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 4.Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA
推荐引用方式 GB/T 7714	Upchurch, Paul,Barrett, Paul M.,Zhao Xijin,et al. A re-evaluation of Chinshakiangosaurus chunghoensis Ye vide Dong 1992 (Dinosauria, Sauropodomorpha): implications for cranial evolution in basal sauropod dinosaurs[J]. GEOLOGICAL MAGAZINE,2007,144(2):247-262.
APA	Upchurch, Paul,Barrett, Paul M.,Zhao Xijin,Xu Xing,&p.upchurch@ucl.ac.uk.(2007).A re-evaluation of Chinshakiangosaurus chunghoensis Ye vide Dong 1992 (Dinosauria, Sauropodomorpha): implications for cranial evolution in basal sauropod dinosaurs.GEOLOGICAL MAGAZINE,144(2),247-262.
MLA	Upchurch, Paul,et al."A re-evaluation of Chinshakiangosaurus chunghoensis Ye vide Dong 1992 (Dinosauria, Sauropodomorpha): implications for cranial evolution in basal sauropod dinosaurs".GEOLOGICAL MAGAZINE 144.2(2007):247-262.

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