Male spike strobiles with Gnetum affinity from the Early Cretaceous in western Liaoning, Northeast China

doi:10.1111/j.1759-6831.2009.00007.x

	Male spike strobiles with Gnetum affinity from the Early Cretaceous in western Liaoning, Northeast China
	Guo, Shuang-Xing 1,2; Sha, Jin-Geng 3; Bian, Li-Zeng 4; Qiu, Yin-Long 5
通讯作者	guosx2006@yahoo.com.cn
	2009-03-01
发表期刊	JOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN	0529-1526
卷号	47 期号:2 页码:93-102
摘要	A fossil with Gnetum affinity was found in the Jianshangou Member (Barremian Age) of the Yixian Formation (Lower Cretaceous Epoch) of the Jehol Group in western Liaoning, northeastern China. The single fossil specimen is represented by both elongate-cylindrical male spike strobiles which home within a nodal bract of cauliflorous branch. The spike strobiles have apparent nodes, invisible internodes, and numerous verticillate involucral collars. The microsporangiate units within involucral collars are not seen. The male spike strobiles with verticillate involucral collars occur exclusively in Gnetum; hence, the fossil strobiles are attributed to a new taxon, Khitania columnispicata gen. & sp. nov., being closely related to Gnetum. The general isotopic dating suggests an age of Barremian, ca. 125-122 million years (Myr) ago for the Jianshangou Member. The palaeoecological and palaeoclimatic inference based on the compositions of flora and fauna, and lithological characters of the fossil locality suggests that the fossil plants grew in a subtropical mesophytic forest and under a warmer climate. The remains of male spike strobiles are the first record of gnetalean macrofossil. It documents the evolution of the distinct gnetoid morphology and indicates a wider range of distribution of Gnetaceae in the Early Cretaceous than present day.
关键词	Biogeography Early Cretaceous Gnetum Affinity Male Spike Strobiles Northeastern China
学科领域	Plant Sciences
DOI	10.1111/j.1759-6831.2009.00007.x
收录类别	SCI
语种	英语
WOS记录号	WOS:000264959200001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/2713
专题	中国科学院东亚植物多样性与生物地理学重点实验室
作者单位	1.Chinese Acad Sci, Nanjing Inst Geol & Paleontol, Dept Palaeobot & Palynol, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, Lab Biodivers & Biogeog, Kunming 650204, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 4.Nanjing Univ, Coll Earth Sci, Nanjing 210093, Peoples R China 5.Univ Michigan, Univ Herbarium, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 48109 USA
推荐引用方式 GB/T 7714	Guo, Shuang-Xing,Sha, Jin-Geng,Bian, Li-Zeng,et al. Male spike strobiles with Gnetum affinity from the Early Cretaceous in western Liaoning, Northeast China[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2009,47(2):93-102.
APA	Guo, Shuang-Xing,Sha, Jin-Geng,Bian, Li-Zeng,&Qiu, Yin-Long.(2009).Male spike strobiles with Gnetum affinity from the Early Cretaceous in western Liaoning, Northeast China.JOURNAL OF SYSTEMATICS AND EVOLUTION,47(2),93-102.
MLA	Guo, Shuang-Xing,et al."Male spike strobiles with Gnetum affinity from the Early Cretaceous in western Liaoning, Northeast China".JOURNAL OF SYSTEMATICS AND EVOLUTION 47.2(2009):93-102.

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