The smallest known non-avian theropod dinosaur

IVPP-IR > 中科院古脊椎所（2000年以后）

	The smallest known non-avian theropod dinosaur
	Xu, Xing(徐星); Zhou, Zhonghe(周忠和); Wang, XL(汪筱林); Xu, X (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, POB 643, Beijing 100044, Peoples R China.
	2000
发表期刊	NATURE
ISSN	0028-0836
卷号	408 期号:6813 页码:705—708
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.
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文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/3899
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	Xu, X (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, POB 643, Beijing 100044, Peoples R China.
推荐引用方式 GB/T 7714	Xu, Xing,Zhou, Zhonghe,Wang, XL,et al. The smallest known non-avian theropod dinosaur[J]. NATURE,2000,408(6813):705—708.
APA	Xu, Xing,Zhou, Zhonghe,Wang, XL,&Xu, X .(2000).The smallest known non-avian theropod dinosaur.NATURE,408(6813),705—708.
MLA	Xu, Xing,et al."The smallest known non-avian theropod dinosaur".NATURE 408.6813(2000):705—708.

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