A redescription of Chaoyangia beishanensis (Aves) and a comprehensive phylogeny of Mesozoic birds

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	A redescription of Chaoyangia beishanensis (Aves) and a comprehensive phylogeny of Mesozoic birds
	O'Connor, Jingmai K.; Zhou, Zhonghe; O'Connor, JK (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Evolutionary Systemat Vertebrates, 142 Xizhimenwai Dajie, Beijing 100044, Peoples R China.
	2013-10-01
发表期刊	JOURNAL OF SYSTEMATIC PALAEONTOLOGY
ISSN	1477-2019
卷号	11 期号:7 页码:889-906
文章类型	Article
摘要	We review the enigmatic Chaoyangia beishanensis, one of the earliest birds described from the Jiufotang Formation, north-eastern China, and the first to be identified as an ornithurine (Aves: Ornithothoraces) and thus a member of the clade that includes living birds. A complete discussion of the validity of this taxon, which once included the holotype of Songlingornis, is provided, along with a revised diagnosis. The morphology of Chaoyangia is described, including extensive comparison with better known, recently discovered ornithurines as well as several other groups of Mesozoic birds (Confuciusornithiformes, Sapeornithiformes, Enantiornithes). Although preserved information is limited, the large number of fused sacral vertebrae and presence of a distal dorsal process on the ischium are among the features supporting early hypotheses that the only known specimen of Chaoyangia represents an ornithurine. Unique among ornithurines, Chaoyangia possesses two dorsal processes on the ischium, and thus remains a valid taxon. We include this taxon in a cladistic analysis to test morphological hypotheses regarding its systematic position. Although the results of the analysis are highly resolved and support the referral of Chaoyangia and Zhongjianornis to Ornithurae, support for the tree overall is very low. Recently discovered taxa have blurred the once clear morphological gap separating the two ornithothoracine clades (Ornithurae and Enantiornithes), and thus the increase in taxonomic diversity has caused a decrease in the stability of hypothetical & break; relationships.
关键词	Chaoyangia Jehol Ornithurine Zhongjianornis Songlingornithidae
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]	CRETACEOUS BIRD ; AVIAN EVOLUTION ; NORTHEASTERN CHINA ; ORNITHURINE BIRD ; JEHOL-BIOTA ; DIVERSITY ; AGE ; ENANTIORNITHES ; ARCHAEOPTERYX ; MADAGASCAR
收录类别	SCI
语种	英语
项目资助者	Chinese National Natural Science Foundation [KA 210417, 41172020]; Fellowship for Young International Scientists of the Chinese Academy of Sciences [KC 210201]; National Basic Research Program of China (973 Program) [2012CB821906]
WOS研究方向	Evolutionary Biology ; Paleontology
WOS类目	Evolutionary Biology ; Paleontology
WOS记录号	WOS:000326860800006
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/5218
专题	古哺乳动物研究室古低等脊椎动物研究室
通讯作者	O'Connor, JK (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Evolutionary Systemat Vertebrates, 142 Xizhimenwai Dajie, Beijing 100044, Peoples R China.
作者单位	Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Evolutionary Systemat Vertebrates, Beijing 100044, Peoples R China
推荐引用方式 GB/T 7714	O'Connor, Jingmai K.,Zhou, Zhonghe,O'Connor, JK . A redescription of Chaoyangia beishanensis (Aves) and a comprehensive phylogeny of Mesozoic birds[J]. JOURNAL OF SYSTEMATIC PALAEONTOLOGY,2013,11(7):889-906.
APA	O'Connor, Jingmai K.,Zhou, Zhonghe,&O'Connor, JK .(2013).A redescription of Chaoyangia beishanensis (Aves) and a comprehensive phylogeny of Mesozoic birds.JOURNAL OF SYSTEMATIC PALAEONTOLOGY,11(7),889-906.
MLA	O'Connor, Jingmai K.,et al."A redescription of Chaoyangia beishanensis (Aves) and a comprehensive phylogeny of Mesozoic birds".JOURNAL OF SYSTEMATIC PALAEONTOLOGY 11.7(2013):889-906.

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