Diversity in affinities of plants with lateral sporangia from the Lower Devonian of Sichuan Province, China

doi:10.1016/j.revpalbo.2018.07.002

	Diversity in affinities of plants with lateral sporangia from the Lower Devonian of Sichuan Province, China
	Edwards, Dianne 1; Li, Cheng-Sen
	2018
发表期刊	REVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN	0034-6667
卷号	258 页码:98-111
摘要	Five plant species, all with lateral sporangia aggregated into strobili terminating smooth stems, have been circumscribed from the Lower Devonian Pingyipu Group exposed in Jiangyou County, Sichuan, China. Four have involved reinvestigation of fossils described more than twenty years ago plus, in some instances, observations on more recently collected fossils, whilst the fifth, Adoketophyton pingyipuensis sp. nov., unusual in that the strobilus contains bracts, is based on new material. The fossils are preserved as coalified compressions and impressions and lack anatomy. Zosterophyllum ovatum was originally called Zosterophyllum myretonianum, but mainly differs from the type species in sporangial shape. The plant first named Zosterophyllum sichuanensis has been placed in a new genus Ornicephalum, because it possesses bivalved sporangia with markedly unequal valves. Two species of Amplectosporangium, whose terminal fertile complexes are unique because they comprise collections of dichotomously branching axes bearing rows of sessile or almost sessile sporangia, are distinguished by the amount of branching in the fertile complex and on sporangial shape. The one with simpler branching was originally placed in the North American genus Oricilla. The classification of the zosterophylls, relationships within the lycophytes and, in this study, particularly the affinities of Adoketophyton, here considered a barinophyte, require revision. Considering geographical relations, at species level all taxa are restricted to the locality. At generic level, Zosterophyllum is cosmopolitan, Adoketophyton is also recorded in Yunnan, whilst Amplectosporangium and Ornicephalum are restricted to Sichuan, providing further evidence for the preponderance of endemicity in Chinese Lower Devonian vegetation whilst reinforcing differences between the assemblages in the two Chinese provinces. The reasons for this remain conjectural. (C) 2018 Elsevier B.V. All rights reserved.
关键词	Endemics Lochkovian-Pragian Lower Devonian Plant megafossils Sichuan tracheophytes
学科领域	Plant Sciences ; Paleontology
DOI	10.1016/j.revpalbo.2018.07.002
收录类别	SCI
语种	英语
WOS关键词	YUNNAN PROVINCE ; POSONGCHONG FORMATION ; XITUN FORMATION ; SP-NOV ; GENUS ; ZOSTEROPHYLLUM
WOS记录号	WOS:000452945900009
出版者	ELSEVIER SCIENCE BV
文献子类	Article
出版地	AMSTERDAM
EISSN	1879-0615
资助机构	Chinese Academy of SciencesChinese Academy of Sciences [2013T2S0022] ; Royal Society of LondonRoyal Society of London
作者邮箱	EdwardsD2@cardiff.ac.uk
作品OA属性	Green Accepted
引用统计	被引频次：11[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/2S10CLM1/20405
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, Key State Lab Systemat & Evolutionary Bot, Beijing, Peoples R China 2.Cardiff Univ, Sch Earth & Ocean Sci, Pk Pl, Cardiff CF10 3AT, S Glam, Wales
推荐引用方式 GB/T 7714	Edwards, Dianne,Li, Cheng-Sen. Diversity in affinities of plants with lateral sporangia from the Lower Devonian of Sichuan Province, China[J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2018,258:98-111.
APA	Edwards, Dianne,&Li, Cheng-Sen.(2018).Diversity in affinities of plants with lateral sporangia from the Lower Devonian of Sichuan Province, China.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,258,98-111.
MLA	Edwards, Dianne,et al."Diversity in affinities of plants with lateral sporangia from the Lower Devonian of Sichuan Province, China".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 258(2018):98-111.

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