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题名: A new Quercus species from the upper Miocene of southwestern China and its ecological significance
作者: Xing, Yaowu1, 3, 6; null(胡瑾瑾)2, 4; Jacques, Frederic M. B.1; Wang, Li1; Su, Tao1; Huang, Yongjiang2, 4; Liu, Yu-Sheng (Christopher)5; Zhou, Zhekun1, 2
刊名: REVIEW OF PALAEOBOTANY AND PALYNOLOGY
关键词: Quercus praedelavayi ; Quercus ; leaf morphology ; late Miocene ; Yunnan ; China
英文摘要: Quercus praedelavayi Xing Y.W. et Zhou Z.K. sp. nov. is reported from the upper Miocene of the Xianfeng flora in central Yunnan, southwestern China. The fossil species is identified based on the detailed leaf morphological and cuticular examinations. The primary venation is pinnate and the major secondary venation is craspedodromous with regular spacing. Stomata are anomocytic and occur on abaxial epidermis. Trichome bases are unicellular and multicellular. The new fossil species shows the closest affinity with Quercus delavayi, an extant species distributing in southwestern China. The responses of the functional leaf traits to the climate change were studied by comparing the leaf characters of fossil species and its nearest living relative. The stomatal density of Q. praedelavayi is higher than Q. delavayi, which suggests a lower palaeoatmospheric CO2 concentration during the late Miocene. The trichome base density of Q. praedelavayi is higher than the extant Q delavayi. Considering the palaeoclimatic reconstruction of Xianfeng flora, it rejected the hypothesis that increase in trichome density is an adaptation to the drier environment. (C) 2013 Elsevier B.V. All rights reserved.
出版日期: 2013-06-17
卷号: 193, 页码:99-109
语种: 英语
ISSN号: 0034-6667
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内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/16635
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Mengla 666303, Peoples R China
2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biogeog & Biodivers, Kunming 650201, Peoples R China
3.Univ Zurich, Inst Systemat Bot, CH-8008 Zurich, Switzerland
4.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
5.E Tennessee State Univ, Dept Biol Sci, Johnson City, TN 37614 USA
6.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China

Recommended Citation:
Xing, Yaowu; Hu, Jinjin; Jacques, Frederic M. B.; Wang, Li; Su, Tao; Huang, Yongjiang; Liu, Yu-Sheng (Christopher); Zhou, Zhekun.A new Quercus species from the upper Miocene of southwestern China and its ecological significance,REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2013,193():99-109
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