A New Species of Ginkgo with Male Cones and Pollen Grains in situ from the Middle Jurassic of Eastern Xinjiang, China

doi:10.1111/1755-6724.13060

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	A New Species of Ginkgo with Male Cones and Pollen Grains in situ from the Middle Jurassic of Eastern Xinjiang, China
	Wang Zixi 1,2,3; Sun Fankai 1,2; Jin Peihong 1,2; Chen Yingquan 1,2; Chen Jingwei 1,2; Deng Peng 1,2; Yang Guolin 1,2; Sun Bainian 1,2,3
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2017-02-01
卷号	91 期号:1 页码:9-21
关键词	Ginkgo Hamiensis Pollen Cones Middle Jurassic Xinjiang Uygur Autonomous Region Systematic Evolution
ISSN号	1000-9515
DOI	10.1111/1755-6724.13060
文献子类	Article
英文摘要	Well-preserved Ginkgo pollen organs are analyzed from the Middle Jurassic Xishanyao Formation of the Turpan-Hami Basin, Xinjiang Uygur Autonomous Region, northwestern China, and are described as a new species, Ginkgo hamiensis Z.X. Wang et B.N. Sun sp. nov. The immature male cones are cylindrical and catkin-like, with two longitudinal stripes on the stalk. The pollen sacs are shaped like a long oval with two pollen sacs fused together for each microsporophyll, and the microsporophyll tip is a triangular cystidium. The pollen grains are oblong or fusiform and monocolpate; both ends are blunt or sharp. By comparison with previously reported fossil records of Ginkgo plants, we determined that the current fossils are different from all other reported species; thus, the present fossil is referred to as a new species of Ginkgo. The reproductive organs of the Ginkgo fossils described herein can provide valuable information for the study of Ginkgo plants. Further, there are two probable evolutionary trends in the Ginkgo pollen cones. One trend is that the number of pollen sacs changed from three or four during the Jurassic and Cretaceous to two at the present day; the other is that the number of pollen sacs has remained two from the Middle Jurassic to the present day. In addition, the pollen cones described herein are similar to the pollen cones of the extant Ginkgo, which strongly indicates that the morphology of Ginkgo plants may have remained highly conserved over millions of years.
WOS关键词	INNER-MONGOLIA ; LATE PLIOCENE ; SP-NOV ; CHARACTERS ; BEARING ; FOSSILS ; YUNNAN ; LEAF
WOS研究方向	Geology
语种	英语
出版者	WILEY
WOS记录号	WOS:000395768100002
资助机构	National Natural Science Foundation of China(41172022) ; Funds of Key Laboratory of Petroleum Resources, Gansu Province(SZD-KFJJ20150603) ; Fundamental Research Funds for the Central Universities(lzujbky-2016-202) ; National Natural Science Foundation of China(41172022) ; Funds of Key Laboratory of Petroleum Resources, Gansu Province(SZD-KFJJ20150603) ; Fundamental Research Funds for the Central Universities(lzujbky-2016-202) ; National Natural Science Foundation of China(41172022) ; Funds of Key Laboratory of Petroleum Resources, Gansu Province(SZD-KFJJ20150603) ; Fundamental Research Funds for the Central Universities(lzujbky-2016-202) ; National Natural Science Foundation of China(41172022) ; Funds of Key Laboratory of Petroleum Resources, Gansu Province(SZD-KFJJ20150603) ; Fundamental Research Funds for the Central Universities(lzujbky-2016-202)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/52986]
专题	地质与地球物理研究所_兰州油气中心
通讯作者	Sun Bainian
作者单位	1.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China 2.Lanzhou Univ, Key Lab Mineral Resources Western China Gansu Pro, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Wang Zixi,Sun Fankai,Jin Peihong,et al. A New Species of Ginkgo with Male Cones and Pollen Grains in situ from the Middle Jurassic of Eastern Xinjiang, China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2017,91(1):9-21.
APA	Wang Zixi.,Sun Fankai.,Jin Peihong.,Chen Yingquan.,Chen Jingwei.,...&Sun Bainian.(2017).A New Species of Ginkgo with Male Cones and Pollen Grains in situ from the Middle Jurassic of Eastern Xinjiang, China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,91(1),9-21.
MLA	Wang Zixi,et al."A New Species of Ginkgo with Male Cones and Pollen Grains in situ from the Middle Jurassic of Eastern Xinjiang, China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 91.1(2017):9-21.