Feathered dinosaurs from China and the evolution of major avian characters

IVPP-IR > 中科院古脊椎所（2000年以后）

	Feathered dinosaurs from China and the evolution of major avian characters
	Xu, Xing; Xu, X (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China.
	2006-03-01
发表期刊	INTEGRATIVE ZOOLOGY
ISSN	1749-4877
卷号	1 期号:1 页码:4-11
文章类型	Review
摘要	Recent discoveries of feathered dinosaurs from Early Cretaceous deposits in Liaoning, China, have not only lent strongest support for the dinosaurian hypothesis of bird origins, but have also provided much-needed information about the origins of feathers and avian flight. Preliminary analysis of character evolution suggests that the major avian osteological characters were acquired during the early evolution of maniraptoran dinosaurs. The available evidence also suggests that the first feathers with a filamentous morphology probably evolved in basal coelurosaurs and pennaceous feathers (including those with aerodynamic features) were developed in non-avian maniraptorans, indicating that feathers evolved before the origin of birds and their flight. An evolutionary model is proposed here to describe the major stages of feather evolution, a process characterized by a combination of both transformational and innovative modifications. This model is different from some recent developmental models, which suggest that feathers are evolutionary novelties without a homologous relationship to reptilian scales. Although non-avian theropods are traditionally regarded as distinctly cursorial animals, recent discoveries suggest that the closest relatives of birds might be arboreal theropods. Many bird features, such as the furcula and pennaceous feathers, evolved in a terrestrial context, whereas others, such as some pedal modifications, may have evolved in an arboreal context. Consequently, arboreality may have also contributed to the origin of avian flight.; Recent discoveries of feathered dinosaurs from Early Cretaceous deposits in Liaoning, China, have not only lent strongest support for the dinosaurian hypothesis of bird origins, but have also provided much-needed information about the origins of feathers and avian flight. Preliminary analysis of character evolution suggests that the major avian osteological characters were acquired during the early evolution of maniraptoran dinosaurs. The available evidence also suggests that the first feathers with a filamentous morphology probably evolved in basal coelurosaurs and pennaceous feathers (including those with aerodynamic features) were developed in non-avian maniraptorans, indicating that feathers evolved before the origin of birds and their flight. An evolutionary model is proposed here to describe the major stages of feather evolution, a process characterized by a combination of both transformational and innovative modifications. This model is different from some recent developmental models, which suggest that feathers are evolutionary novelties without a homologous relationship to reptilian scales. Although non-avian theropods are traditionally regarded as distinctly cursorial animals, recent discoveries suggest that the closest relatives of birds might be arboreal theropods. Many bird features, such as the furcula and pennaceous feathers, evolved in a terrestrial context, whereas others, such as some pedal modifications, may have evolved in an arboreal context. Consequently, arboreality may have also contributed to the origin of avian flight.
关键词	Birds Feathered Dinosaurs Feathers Flight
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
URL	查看原文
收录类别	SCI
语种	英语
WOS研究方向	Zoology
WOS类目	Zoology
WOS记录号	WOS:000208682400003
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/3471
专题	中科院古脊椎所（2000年以后）
通讯作者	Xu, X (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China.
作者单位	Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Xu, Xing,Xu, X . Feathered dinosaurs from China and the evolution of major avian characters[J]. INTEGRATIVE ZOOLOGY,2006,1(1):4-11.
APA	Xu, Xing,&Xu, X .(2006).Feathered dinosaurs from China and the evolution of major avian characters.INTEGRATIVE ZOOLOGY,1(1),4-11.
MLA	Xu, Xing,et al."Feathered dinosaurs from China and the evolution of major avian characters".INTEGRATIVE ZOOLOGY 1.1(2006):4-11.

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