A new genus of fossil Cycads Yixianophyllum gen nov from the Late;Jurassic Yixian Formation, Western Liaoning, China

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	A new genus of fossil Cycads Yixianophyllum gen nov from the Late;Jurassic Yixian Formation, Western Liaoning, China
	Zheng, SL 3; Li, N ; Li, Y ; Zhang, W ; Bian, XF
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2005
卷号	79 期号:5 页码:582-592
关键词	western Liaoning Yixian Formation Late Jurassic Cycads Yixianophyllum gen. nov. epidermal structures
ISSN号	1000-9515
英文摘要	A new genus of fossil Cycads, Yixianophyllum gen. nov., is reported here. The specimens were collected from the southern hill of Jinjiagou village, Toudaohezi Town, Yixian County, western Liaoning Province, China. The fossil plant-bearing bed belongs to the lower part, the Zhuanchengzi bed, of the Upper Jurassic Yixian Formation (Yixianian). The new genus in leaf shape, venation and epidermal structure shows a transitional form between Mesozoic Cycads (Ctenis, Nilssonia) and modem Cycads (Stangeria and Encephalartos). Since the features of these specimens differ from any known genera of Cycads, a new generic name Yixianophyllum is proposed for these leaves. Typical species, Yixianophyllum jinjiagouense gen. et sp. nov. is described here. A supposed evolutionary tendency of Cycadean leaf-forms with Taeniopteris-type is discussed.
学科主题	古生物学
WOS关键词	NORTHEASTERN CHINA ; ARCHAEFRUCTUS ; ANGIOSPERM ; PTEROSAUR ; DINOSAURS ; EVOLUTION ; PROVINCE ; GINKGO
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC CHINA
WOS记录号	WOS:000232988300002
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37885]
专题	中国地质调查局沈阳地质调查中心
作者单位	1.Shenyang Inst Geol & Mineral Resources, Shenyang 110032, Liaoning, Peoples R China. 2.Bot Gardens Xianhu, Shenzhen 518004, Guangdong, Peoples R China. 3.中国地质调查局沈阳地质调查中心
推荐引用方式 GB/T 7714	Zheng, SL,Li, N,Li, Y,et al. A new genus of fossil Cycads Yixianophyllum gen nov from the Late;Jurassic Yixian Formation, Western Liaoning, China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2005,79(5):582-592.
APA	Zheng, SL,Li, N,Li, Y,Zhang, W,&Bian, XF.(2005).A new genus of fossil Cycads Yixianophyllum gen nov from the Late;Jurassic Yixian Formation, Western Liaoning, China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,79(5),582-592.
MLA	Zheng, SL,et al."A new genus of fossil Cycads Yixianophyllum gen nov from the Late;Jurassic Yixian Formation, Western Liaoning, China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 79.5(2005):582-592.