Jeholornis compared to Archaeopteryx, with a new understanding of the earliest avian evolution

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	Jeholornis compared to Archaeopteryx, with a new understanding of the earliest avian evolution
	Zhou, ZH; Zhang, FC
	2003-05-01
发表期刊	NATURWISSENSCHAFTEN
卷号	90 期号:5 页码:220-225
文章类型	Article
摘要	The recently reported Jeholornis represents the only known bird with a complete long skeletal tail except for Archaeopteryx. Two newly discovered specimens referable to Jeholornis provide some important new information about its anatomy. The tail of Jeholornis is much longer than that of Archaeopteryx and comprises a maximum of 27 caudal vertebrae compared with only 23 in Archaeopteryx. More interestingly, the tail feathers are shaped more like those of dromaeosaurs than those of Archaeopteryx. We conclude that the common ancestor of birds must have a more primitive tail than that in Archaeopteryx, confirming the side branch position of Archaeopteryx in the early avian evolution. The synsacrum is composed of six sacrals, representing a transitional stage between Archaeopteryx and more advanced birds. The scapula of Jeholornis has a dorsolaterally exposed glenoid facet, and the coracoid has a supracoracoid foramen. The presence of a pair of fenestrae in the sternum of Jeholornis has further implications for the air-sac system in early birds. Electronic Supplementary Material Supplementary material is available for this article if you access the article at http://dx.doi.org/10.1007/s00114-003-0416-5. A link in the frame on the left on that page takes you directly to the supplementary material.
WOS标题词	Science & Technology
关键词[WOS]	NORTHEASTERN CHINA ; BIRD ; DIVERSIFICATION ; DINOSAURS ; FEATHERS
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:000183550800003
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/2086
专题	古低等脊椎动物研究室
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	Zhou, ZH,Zhang, FC. Jeholornis compared to Archaeopteryx, with a new understanding of the earliest avian evolution[J]. NATURWISSENSCHAFTEN,2003,90(5):220-225.
APA	Zhou, ZH,&Zhang, FC.(2003).Jeholornis compared to Archaeopteryx, with a new understanding of the earliest avian evolution.NATURWISSENSCHAFTEN,90(5),220-225.
MLA	Zhou, ZH,et al."Jeholornis compared to Archaeopteryx, with a new understanding of the earliest avian evolution".NATURWISSENSCHAFTEN 90.5(2003):220-225.

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