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Middle Miocene Cephalotaxus (Taxaceae) from Yunnan, Southwest China, and its implications to taxonomy and evolution of the genus
Zhang, Jian-Wei; D'Rozario, Ashalata; Liang, Xiao-Qing; Zhou, Zhe-Kun
2019
Source PublicationPALAEOWORLD
ISSN1871-174X
Volume28Issue:3Pages:381-402
Abstract

The infrageneric taxonomy of the genus Cephalotaxus Siebold et Zuccarini ex Endlicher (Taxaceae) is controversial as morphological characters have been doubted to change coherently among species. Although the epidermal features are considered as important characters in the taxonomy of conifers, they have not been systematically studied in this genus. Neogene foliage shoots with well-preserved epidermal structure not only can provide systematic links to the extant species, but also have implications for the taxonomical definition of the extant species by their epidermal features. In this paper, the morphologies of leafy shoots combining epidermal structure of a Neogene Cephalotaxus, which was collected from the middle Miocene of Southwest China, and ten extant species (variants) were studied. Morphology as well as epidermal structures was compared among species (variants) in Cephalotaxus. Based on the comparisons, the taxonomical definition of extant species in genus Cephalotaxus are discussed. Our results indicate that leaf morphological characters in combination with the features of epidermal structure can distinguish species in genus Cephalotaxus. The fossil foliage shoots from the middle Miocene of Southwest China were assigned to a new species, C. maguanensis n. sp., which shows close affinities to the extant C. hainanensis. On the basis of leaf and epidermal information, we suggest there are seven extant species in Cephalotaxus. With global cooling and the uplift of the Qinghai-Tibet Plateau since the middle Miocene, the cooling climate induced the differentiation and southward expansions of C. maguanensis, and its extant offspring, C. hainanensis, is distributed to Hainan Island and the Indo-Chinese peninsula. (C) 2019 Elsevier Ireland Ltd Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. Published by Elsevier B.V. All rights reserved.

KeywordCephalotaxus Epidermis Middle Miocene Morphology Taxonomy China
Subject AreaPaleontology
DOI10.1016/j.palwor.2019.01.002
Indexed BySCI
Language英语
WOS IDWOS:000482562600012
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11496
Collection古生态研究组
Affiliation1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, 818 South Beijing Rd, Urumqi 830011, Xinjiang, Peoples R China
2.Narasinha Dutt Coll, Dept Bot, 129 Bellilious Rd, Howrah 711101, W Bengal, India
3.Yuxi Normal Univ, Yuxi 653100, Yunnan, Peoples R China
4.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Jian-Wei,D'Rozario, Ashalata,Liang, Xiao-Qing,et al. Middle Miocene Cephalotaxus (Taxaceae) from Yunnan, Southwest China, and its implications to taxonomy and evolution of the genus[J]. PALAEOWORLD,2019,28(3):381-402.
APA Zhang, Jian-Wei,D'Rozario, Ashalata,Liang, Xiao-Qing,&Zhou, Zhe-Kun.(2019).Middle Miocene Cephalotaxus (Taxaceae) from Yunnan, Southwest China, and its implications to taxonomy and evolution of the genus.PALAEOWORLD,28(3),381-402.
MLA Zhang, Jian-Wei,et al."Middle Miocene Cephalotaxus (Taxaceae) from Yunnan, Southwest China, and its implications to taxonomy and evolution of the genus".PALAEOWORLD 28.3(2019):381-402.
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