A new species of vascular plants from the Xujiachong Formation (Lower   Devonian) of Yunnan Province, China

doi:10.1016/S0034-6667(01)00041-0

CORC > 北京大学 > 地球与空间科学学院

	A new species of vascular plants from the Xujiachong Formation (Lower Devonian) of Yunnan Province, China
	Wang, DM ; Hao, SG
刊名	review of palaeobotany and palynology
	2001
关键词	Huia gracilis Xujiachong Formation Lower Devonian China fossil plant WATER-CONDUCTING CELLS LAND PLANTS ZOSTEROPHYLL MORPHOLOGY ANATOMY
DOI	10.1016/S0034-6667(01)00041-0
英文摘要	A new species of early land vascular plants, Huia gracilis, is described from the Lower Devonian (Pragian-early Emsian) Xujiachong Formation, Qujing district, Yunnan Province, southwestern China. The plant possesses K- or H-type branching in the rhizome and a dichotomously branched erect system. An axillary tubercle is sometimes present at. the branching position. Fertile axes terminate in loose spikes comprising terminal and lateral sporangia arranged helically. Sporangia with long stalks are ovate or elongate-ovate and reflex adaxially. The sporangium dehisces longitudinally in the radial plane of the fertile axis into two parts. The xylem is probably centrarch. Tracheids of G-type are characterised by annular secondary thickenings, between which is a sheet with irregular simple perforations. There may be some 'pores' in the enclosing wall of the perforation. H. gracilis differs from the type species H. recurvata mainly in the branching pattern, more slender morphology of the stem, sporangium and stalk. It is suggested that Huia may have originated from the primitive Cooksonia-like plants. (C) 2001 Elsevier Science B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000169887700002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Plant Sciences; Paleontology; SCI(E); PubMed; 13; ARTICLE; 3-4; 157-174; 114
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/200517]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wang, DM,Hao, SG. A new species of vascular plants from the Xujiachong Formation (Lower Devonian) of Yunnan Province, China[J]. review of palaeobotany and palynology,2001.
APA	Wang, DM,&Hao, SG.(2001).A new species of vascular plants from the Xujiachong Formation (Lower Devonian) of Yunnan Province, China.review of palaeobotany and palynology.
MLA	Wang, DM,et al."A new species of vascular plants from the Xujiachong Formation (Lower Devonian) of Yunnan Province, China".review of palaeobotany and palynology (2001).