New Plants from the Lower Devonian Pingyipu Group, Jiangyou County, Sichuan Province, China

doi:10.1371/journal.pone.0163549

	New Plants from the Lower Devonian Pingyipu Group, Jiangyou County, Sichuan Province, China
	Edwards, Dianne 1; Geng, Bao-Yin ; Li, Cheng-Sen
	2016
发表期刊	PLOS ONE
ISSN	1932-6203
卷号	11 期号:11
摘要	Descriptions of Lower Devonian plants from Yunnan, South China, have revolutionized concepts of diversity and disparity in tracheophytes soon after they became established on land. Sichuan assemblages have received little attention since their discovery almost 25 years ago and require revision. With this objective, fieldwork involving detailed logging and collection of fossils was undertaken in the Longmenshan Mountain Region, Jiangyou County and yielded the two new taxa described here. They are preserved as coalified compressions and impressions that allowed morphological but not anatomical analyses. Yanmenia (Zosterophyllum) longa comb nov is based on numerous rarely branching shoots with enations resembling lycophyte microphylls, without evidence for vasculature. The presence of sporangia is equivocal making assignation to the Lycopsida conjectural. The plant was recently described as a zosterophyll, but lacks strobili. These are present in the second plant and comprise bivalved sporangia. The strobili terminate aerial stems which arise from a basal axial complex displaying diversity in branching including H-and K-forms. These features characterise the Zosterophyllopsida, although the plant differs from Zosterophyllum in valve shape. Comparisons indicate greatest similarities to the Lower Devonian Guangnania cuneata, from Yunnan, but differences, particularly in the nature of the sporangium border, require the erection of a new species, G. minor. Superficial examination of specimens already published indicate a high degree of endemism at both species and generic level, while this study shows that Yanmenia is confined to Sichuan and Guangnania is one of the very few genera shared with Yunnan, where assemblages also show a high proportion of further endemic genera. Such provincialism noted in the Chinese Lower Devonian is explained by the palaeogeographic isolation of the South China plate, but this cannot account for differences/endemism between the Sichuan and Yunnan floras. Such an enigma demands further integrated geological, palaeobotanical and palynological studies.
学科领域	Multidisciplinary Sciences
DOI	10.1371/journal.pone.0163549
收录类别	SCI
语种	英语
WOS关键词	XUJIACHONG FORMATION ; YUNNAN PROVINCE ; LAND PLANTS ; SP-NOV. ; GEN. ; ASSEMBLAGES
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000387909300003
出版者	PUBLIC LIBRARY SCIENCE
文献子类	Article
出版地	SAN FRANCISCO
资助机构	Royal Society of LondonRoyal Society of London
作者邮箱	Edwardsd2@cardiff.ac.uk
作品OA属性	gold, Green Published, Green Accepted, Green Submitted
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/25027
专题	系统与进化植物学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing, Peoples R China 2.Cardiff Univ, Sch Earth & Ocean Sci, Cardiff, S Glam, Wales
推荐引用方式 GB/T 7714	Edwards, Dianne,Geng, Bao-Yin,Li, Cheng-Sen. New Plants from the Lower Devonian Pingyipu Group, Jiangyou County, Sichuan Province, China[J]. PLOS ONE,2016,11(11).
APA	Edwards, Dianne,Geng, Bao-Yin,&Li, Cheng-Sen.(2016).New Plants from the Lower Devonian Pingyipu Group, Jiangyou County, Sichuan Province, China.PLOS ONE,11(11).
MLA	Edwards, Dianne,et al."New Plants from the Lower Devonian Pingyipu Group, Jiangyou County, Sichuan Province, China".PLOS ONE 11.11(2016).

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