Arid
DOI10.1186/s12862-018-1243-9
Macrofossil evidence unveiling evolution of male cones in Ephedraceae (Gnetidae)
Yang, Yong1; Lin, Longbiao2; Ferguson, David K.3; Wang, Yingwei4
通讯作者Yang, Yong
来源期刊BMC EVOLUTIONARY BIOLOGY
ISSN1471-2148
出版年2018
卷号18
英文摘要

Background: Male cones of modern Ephedraceae are compound and compact. No fossil evidence has so far been found to support an origin of the compact compound male cone from a hypothetical loosely-arranged shoot system.


Results: Here we describe a new macrofossil taxon, Eamesia chinensis Yang, Lin, Ferguson et Wang, gen. et sp. nov., from the Early Cretaceous of western Liaoning, northeastern China. It was an ephedroid shrub bearing male spikes terminal to twigs, but differs from modern Ephedraceae by its loosely-arranged male cones, the axillary male shoot consisting of an elongated synangiophore on which leaf-like foliar organs were inserted, and four sessile synangia terminal to the apex.


Conclusions: The morphology of this fossil suggests that the modern compact male cone of Ephedra was indeed derived from a once loosely-arranged shoot system, and the male reproductive unit originated from a once elongated axillary male shoot This new fossil species thus provides a transitional link from the hypothetical ancestral shoot system to the modern compact morphology. Changes of habitat from closed humid forests to open dry deserts and shifts of the pollination syndrome may have acted as the driving forces behind this morphological evolution.


英文关键词Early cretaceous Ephedra Evolution Gnetophytes Jehol biota Male cone Yixian formation
类型Article
语种英语
国家Peoples R China ; Austria
收录类别SCI-E
WOS记录号WOS:000443107300001
WOS关键词CRETACEOUS YIXIAN FORMATION ; NORTHEASTERN CHINA ; NORTH-AMERICA ; LIAONING PROVINCE ; SP-NOV ; GNETALES ; FOSSIL ; DIVERSITY ; SEEDS ; PHYLOGENY
WOS类目Evolutionary Biology ; Genetics & Heredity
WOS研究方向Evolutionary Biology ; Genetics & Heredity
来源机构中国科学院植物研究所
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/208180
作者单位1.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, 20 Nanxincun, Beijing 100093, Peoples R China;
2.China Railway Grp Ltd, 69 Fuxing Rd, Beijing 100039, Peoples R China;
3.Univ Vienna, Dept Paleontol, A-1090 Vienna, Austria;
4.Chinese Acad Sci, Beijing Bot Garden, 20 Nanxincun, Beijing 100093, Peoples R China
推荐引用方式
GB/T 7714
Yang, Yong,Lin, Longbiao,Ferguson, David K.,et al. Macrofossil evidence unveiling evolution of male cones in Ephedraceae (Gnetidae)[J]. 中国科学院植物研究所,2018,18.
APA Yang, Yong,Lin, Longbiao,Ferguson, David K.,&Wang, Yingwei.(2018).Macrofossil evidence unveiling evolution of male cones in Ephedraceae (Gnetidae).BMC EVOLUTIONARY BIOLOGY,18.
MLA Yang, Yong,et al."Macrofossil evidence unveiling evolution of male cones in Ephedraceae (Gnetidae)".BMC EVOLUTIONARY BIOLOGY 18(2018).
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