A new clade of basal Early Cretaceous pygostylian birds and developmental plasticity of the avian shoulder girdle

doi:10.1073/pnas.1812176115

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	A new clade of basal Early Cretaceous pygostylian birds and developmental plasticity of the avian shoulder girdle
	Wang, Min1,2 ; Stidham, Thomas A.1,2; Zhou, Zhonghe1,2
	2018-10-16
发表期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN	0027-8424
卷号	115 期号:42 页码:10708-10713
摘要	Early members of the clade Pygostylia (birds with a short tail ending in a compound bone termed "pygostyle") are critical for understanding how the modern avian bauplan evolved from long-tailed basal birds like Archaeopteryx. However, the currently limited known diversity of early branching pygostylians obscures our understanding of this major transition in avian evolution. Here, we describe a basal pygostylian, Jinguofortis perplexus gen. et sp. nov., from the Early Cretaceous of China that adds important information about early members of the short-tailed bird group. Phylogenetic analysis recovers a clade (Jinguofortisidae fam. nov.) uniting Jinguofortis and the enigmatic basal avian taxon Chongmingia that represents the second earliest diverging group of the Pygostylia. Jinguofortisids preserve a mosaic combination of plesiomorphic nonavian theropod features such as a fused scapulocoracoid (a major component of the flight apparatus) and more derived flight-related morphologies including the earliest evidence of reduction in manual digits among birds. The presence of a fused scapulocoracoid in adult individuals independently evolved in Jinguofortisidae and Confuciusornithiformes may relate to an accelerated osteogenesis during chondrogenesis and likely formed through the heterochronic process of peramorphosis by which these basal taxa retain the scapulocoracoid of the nonavian theropod ancestors with the addition of flight-related modifications. With wings having a low aspect ratio and wing loading, Jinguofortis may have been adapted particularly to dense forest environments. The discovery of Jinguofortis increases the known ecomorphological diversity of basal pygostylians and highlights the importance of developmental plasticity for understanding mosaic evolution in early birds.
关键词	bird development Mesozoic plasticity phylogeny
DOI	10.1073/pnas.1812176115
关键词[WOS]	EVOLUTION ; CHINA ; ARCHAEOPTERYX ; THEROPODA ; FLIGHT ; AVES ; MORPHOLOGY ; SPECIMEN ; INSIGHT ; ANATOMY
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[41722202] ; National Natural Science Foundation of China[41502002] ; Youth Innovation Promotion Association, Chinese Academy of Sciences Grant[2016073]
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000447491300060
出版者	NATL ACAD SCIENCES
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/10165
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Wang, Min; Zhou, Zhonghe
作者单位	1.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	Wang, Min,Stidham, Thomas A.,Zhou, Zhonghe. A new clade of basal Early Cretaceous pygostylian birds and developmental plasticity of the avian shoulder girdle[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(42):10708-10713.
APA	Wang, Min,Stidham, Thomas A.,&Zhou, Zhonghe.(2018).A new clade of basal Early Cretaceous pygostylian birds and developmental plasticity of the avian shoulder girdle.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(42),10708-10713.
MLA	Wang, Min,et al."A new clade of basal Early Cretaceous pygostylian birds and developmental plasticity of the avian shoulder girdle".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.42(2018):10708-10713.

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