A new Quercus species from the upper Miocene of southwestern China and its ecological significance

CORC > 西双版纳热带植物园 > 中国科学院西双版纳热带植物园 > 古生态研究组

	A new Quercus species from the upper Miocene of southwestern China and its ecological significance
	Zhekun Zhou
刊名	Review of Palaeobotany and Palynology
	2013
卷号	93 期号:x 页码:99-109
关键词	Quercus praedelavayi Quercus leaf morphology late Miocene Yunnan China
中文摘要	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
公开日期	2013-05-02
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/4302]
专题	西双版纳热带植物园_古生态研究组
通讯作者	Zhekun Zhou
推荐引用方式 GB/T 7714	Zhekun Zhou. A new Quercus species from the upper Miocene of southwestern China and its ecological significance[J]. Review of Palaeobotany and Palynology,2013,93(x):99-109.
APA	Zhekun Zhou.(2013).A new Quercus species from the upper Miocene of southwestern China and its ecological significance.Review of Palaeobotany and Palynology,93(x),99-109.
MLA	Zhekun Zhou."A new Quercus species from the upper Miocene of southwestern China and its ecological significance".Review of Palaeobotany and Palynology 93.x(2013):99-109.