The smallest known non-avian theropod dinosaur

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	The smallest known non-avian theropod dinosaur
	Xu, X ; Zhou, ZH; Wang, XL
	2000-12-07
发表期刊	NATURE
卷号	408 期号:6813 页码:705-708
文章类型	Article
摘要	Non-avian dinosaurs are mostly medium to large-sized animals, and to date all known mature specimens are larger than the most primitive bird, Archaeopteryx(1). Here we report on a new dromaeosaurid dinosaur, Microraptor zhaoianus gen. et sp. nov., from the Early Cretaceous Jiufotang Formation of Liaoning, China(2). This is the first mature non-avian dinosaur to be found that is smaller than Archaeopteryx(1), and it eliminates the size disparity between the earliest birds and their closest non-avian theropod relatives. The more bird-like teeth, the Rahonavis-like ischium and the small number of caudal vertebrae of Microraptor are unique among dromaeosaurids and improve our understanding of the morphological transition to birds. The nearly completely articulated foot shows features, such as distally positioned digit I, slender and recurved pedal claws, and elongated penultimate phalanges, that are comparable to those of arboreal birds(3-6). The discovery of these in non-avian theropods provides new insights for studying the palaeoecology of some bird-like theropod dinosaurs.
WOS标题词	Science & Technology
关键词[WOS]	CHINA
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000165815200045
引用统计	被引频次：230[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/1967
专题	古低等脊椎动物研究室
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 2.China Univ Geosci, Coll Earth Sci & Resources, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Xu, X,Zhou, ZH,Wang, XL. The smallest known non-avian theropod dinosaur[J]. NATURE,2000,408(6813):705-708.
APA	Xu, X,Zhou, ZH,&Wang, XL.(2000).The smallest known non-avian theropod dinosaur.NATURE,408(6813),705-708.
MLA	Xu, X,et al."The smallest known non-avian theropod dinosaur".NATURE 408.6813(2000):705-708.

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