Macrofossil evidence unveiling evolution and ecology of early Ephedraceae

doi:10.1016/j.ppees.2015.06.006

	Macrofossil evidence unveiling evolution and ecology of early Ephedraceae
	Yang, Yong ; Ferguson, David K.
	2015
发表期刊	PERSPECTIVES IN PLANT ECOLOGY EVOLUTION AND SYSTEMATICS
ISSN	1433-8319
卷号	17 期号:5 页码:331-346
摘要	The Early Cretaceous Yixian Formation from western Liaoning in northeastern China is well known for its extremely high diversity of plant macrofossils including important basal members of the Gnetales. The Gnetales from the Yixian Formation currently play a significant role in our present understanding of evolution and adaptation within the group. In the present paper the ephedroid macrofossil genus Prognetella Krassilov et Bugdaeva previously known from the Early Cretaceous of Transbaikalia in southern Russia is revised based on additional specimens from the Yixian Formation. Baicarpus Gang Han et al., a recently described genus interpreted as an angiosperm is reduced to synonymy and reinterpreted as a member of the Gnetales, and placed within the genus Prognetella. Reproductive shoots of Prognetella consist of nodes and internodes, and each of these constitutes a lax compound female spike; foliar bracts are paired at each node, and each foliar bract usually encloses a reproductive unit; the paired female reproductive units together with their subtending bracts and the supporting peduncle constitute a diaspore. The diaspore was abscised from the lower node and disseminated when the plant ripened. A cladistic analysis was conducted based on morphological characters of reproductive organs to understand the evolution of early Ephedraceae. The result suggests that Prog-netella is transitional between the genera Siphonospermum Rydin et Friis and Chengia Yang et al. and further illustrates the reduction and sterilization hypothesis previously proposed within the Ephedraceae. In addition, this study discovered a new and unusual dispersal mechanism within the basal members of the Ephedraceae. (C) 2015 Geobotanisches Institut ETH, Stiftung Ruebel. Published by Elsevier GmbH. All rights reserved.
关键词	China Early Cretaceous Gnetophytes Prognetella Yixian Formation
学科领域	Plant Sciences ; Ecology
DOI	10.1016/j.ppees.2015.06.006
收录类别	SCI
语种	英语
WOS关键词	CRETACEOUS YIXIAN FORMATION ; SEED PLANT PHYLOGENY ; JEHOL-BIOTA ; SP-NOV ; LIAONING PROVINCE ; JIANSHANGOU BED ; EPHEDROID PLANT ; GNETALES ; ORIGIN ; FOSSIL
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000363816500001
出版者	ELSEVIER GMBH
文献子类	Article
出版地	MUNICH
资助机构	National Natural Science Foundation of China [J1310002, 31270238, 31470301] ; Fairy Lake Botanical Garden, Shenzhen, China
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/2S10CLM1/25768
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.Ferguson, David K.] Univ Vienna, Dept Paleontol, A-1090 Vienna, Austria
推荐引用方式 GB/T 7714	Yang, Yong,Ferguson, David K.. Macrofossil evidence unveiling evolution and ecology of early Ephedraceae[J]. PERSPECTIVES IN PLANT ECOLOGY EVOLUTION AND SYSTEMATICS,2015,17(5):331-346.
APA	Yang, Yong,&Ferguson, David K..(2015).Macrofossil evidence unveiling evolution and ecology of early Ephedraceae.PERSPECTIVES IN PLANT ECOLOGY EVOLUTION AND SYSTEMATICS,17(5),331-346.
MLA	Yang, Yong,et al."Macrofossil evidence unveiling evolution and ecology of early Ephedraceae".PERSPECTIVES IN PLANT ECOLOGY EVOLUTION AND SYSTEMATICS 17.5(2015):331-346.

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