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(周忠和); Zhang, FC(张福成); Zhou, ZH (reprint author), Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, POB 643, Beijing 100044, Peoples R China.
刊名	NATURWISSENSCHAFTEN
	2003
卷号	90 期号:5 页码:220—225
ISSN号	0028-1042
英文摘要	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.
URL标识	查看原文
公开日期	2013-11-27
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/3732]
专题	古脊椎动物与古人类研究所_图书馆1
通讯作者	Zhou, ZH (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	Zhou, ZH,Zhang, FC,Zhou, ZH . 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,&Zhou, ZH .(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.