A new enantiornitine bird with four long rectrices from the early Cretaceous of northern Hebei, China

IVPP-IR > 中科院古脊椎所（2000年以后）

	A new enantiornitine bird with four long rectrices from the early Cretaceous of northern Hebei, China
	Zheng Xiaoting; Zhang Zihui; Hou Lianhai; zihuizhang@mail.cnu.edu.cn
	2007
发表期刊	ACTA GEOL SIN-ENGL
ISSN	1000-9515
卷号	81 期号:5
摘要	Paraprotopteryx gracilis, a new enantiornithine bird from the Early Cretaceous Yixian Formation in Fengning, northern Hebei Province is erected, based on the following characters: Y-shaped furcula with a long hypocleidum and a much narrow interclavicular angle, and the morphology of the sternum are different from other enantiornithines. Additionally, alular digit bearing the biggest manual claw extends distally to the distal end of the major metacarpal; the minor metacarpal is slender than the major metacarpal. Carpometacarpus only fused proximally; astragalus and calcaneum partially fused to one another but unfused to the tibia. This is the first record of Mesozoic birds in having four long rectrices, which may represent morphologically a secondary sexual character, an intermediate stage from elongated scale to branched feather, and possess functional advantage in supplementing the lifting surface to compensate the unskilled flight.
关键词	Northwestern China Partial Skeleton Gansu Province Mesozoic Bird Avian Flight Evolution Origin Skull Aves
收录类别	SCI收录
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4883
专题	中科院古脊椎所（2000年以后）
通讯作者	zihuizhang@mail.cnu.edu.cn
推荐引用方式 GB/T 7714	Zheng Xiaoting,Zhang Zihui,Hou Lianhai,et al. A new enantiornitine bird with four long rectrices from the early Cretaceous of northern Hebei, China[J]. ACTA GEOL SIN-ENGL,2007,81(5).
APA	Zheng Xiaoting,Zhang Zihui,Hou Lianhai,&zihuizhang@mail.cnu.edu.cn.(2007).A new enantiornitine bird with four long rectrices from the early Cretaceous of northern Hebei, China.ACTA GEOL SIN-ENGL,81(5).
MLA	Zheng Xiaoting,et al."A new enantiornitine bird with four long rectrices from the early Cretaceous of northern Hebei, China".ACTA GEOL SIN-ENGL 81.5(2007).

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