Parallel evolution of leaf morphology in gnetophytes

doi:10.1007/s13127-015-0226-6

	Parallel evolution of leaf morphology in gnetophytes
	Yang, Yong ; Lin, Longbiao 1; Ferguson, David K.
	2015
发表期刊	ORGANISMS DIVERSITY & EVOLUTION
ISSN	1439-6092
卷号	15 期号:4 页码:651-662
摘要	In the present paper, an ephedroid macrofossil species from the Early Cretaceous Yixian Formation of western Liaoning of China is described as new to science: Ephedra multinervia Yang et Lin, sp. nov. This species has typical ephedroid morphology, e.g. the dichasial branching shoot system, swollen nodes, internodes having many fine longitudinal striations and opposite phyllotaxy. Ephedra multinervia has strap-shaped leaves with multiple dichotomizing veins and reduced female cones with a single pair of fertile bracts forming a cupule enclosing two inner seeds. Ephedra multinervia is similar to Ephedra archaeorhytidosperma Yang et al. and Ephedra hongtaoi Wang et Zheng in its reduced bi-ovulate female cone, but differs from the latter two species by the lengthy strap-like leaves bearing multiple parallel veins and its sessile female cones. A new evolutionary hypothesis of the gnetophytes is proposed based on a synthesis of reproductive morphology of macrofossils from the Early Cretaceous and modern representatives. A Chengia-like precursor might have given rise to the Gnetum-Welwitschia clade by diversification of leaf morphology and female reproductive organs. According to this new explanation, the Welwitschia-like strap-like leaves with multiple parallel veins in E. multinervia result from convergence.
关键词	China Early Cretaceous Ephedra Evolution Gnetophytes Gnetum Liaoning Morphology Palaeobotany Welwitschia Yixian Formation
学科领域	Evolutionary Biology ; Zoology
DOI	10.1007/s13127-015-0226-6
收录类别	SCI
语种	英语
WOS关键词	CRETACEOUS YIXIAN FORMATION ; SEED PLANT PHYLOGENY ; SP-NOV ; WELWITSCHIA-MIRABILIS ; LIAONING PROVINCE ; EPHEDROID PLANT ; GNETALES ; FOSSIL ; ORIGIN ; GNETUM
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000365753500002
出版者	SPRINGER HEIDELBERG
文献子类	Article
出版地	HEIDELBERG
EISSN	1618-1077
资助机构	National Natural Science Foundation of China [J1310002, 31270238, 31470301] ; Fairy Lake Botanical Garden
作者邮箱	ephedra@ibcas.ac.cn
引用统计	被引频次：18[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/2S10CLM1/25867
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 100093, Peoples R China 2.China Railway Grp Ltd, Beijing 100039, Peoples R China 3.Ferguson, David K.] Univ Vienna, Dept Paleontol, A-1090 Vienna, Austria
推荐引用方式 GB/T 7714	Yang, Yong,Lin, Longbiao,Ferguson, David K.. Parallel evolution of leaf morphology in gnetophytes[J]. ORGANISMS DIVERSITY & EVOLUTION,2015,15(4):651-662.
APA	Yang, Yong,Lin, Longbiao,&Ferguson, David K..(2015).Parallel evolution of leaf morphology in gnetophytes.ORGANISMS DIVERSITY & EVOLUTION,15(4),651-662.
MLA	Yang, Yong,et al."Parallel evolution of leaf morphology in gnetophytes".ORGANISMS DIVERSITY & EVOLUTION 15.4(2015):651-662.

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