Late Miocene Palaeocarya (Engelhardieae: Juglandaceae) from Southwest China and its biogeographic implications

doi:10.1111/jse.12145

	Late Miocene Palaeocarya (Engelhardieae: Juglandaceae) from Southwest China and its biogeographic implications
	Meng,Hong-Hu; Su,Tao; Huang,Yong-Jiang; Zhu,Hai; Zhou,Zhe-Kun
	2015-11-01
发表期刊	JOURNAL OF SYSTEMATICS AND EVOLUTION
卷号	53 期号:6 页码:499-511
摘要	Fossil fruits of Palaeocarya (Juglandaceae) are described from late Miocene sediments of southeastern Yunnan, China. The fruits present a tri-lobed wing consisting of an intact oblong-ovate middle lobe and two lateral lobes. The lobes are apically obovate, and have pinnate venation. The middle lobe is thicker at the base and gradually tapers to the apex. The nutlet, located at the base of the winged fruit, is round and hispid, and is subdivided by a septum into two compartments. Based on extensive morphological comparisons to previously documented fossil fruits, we found that the fossil fruits align most closely with members of the genus Palaeocarya, but have a unique combination of characters. Thus, we describe the fossils as a new species, Palaeocarya hispida sp. nov. This species represents an important range expansion for low-latitude occurrences of Palaeocarya in the late Miocene and therefore substantially improves our understanding of the biogeographic history of the genus. We propose that the wide distribution of Palaeocarya and relatively narrow distributions of close relatives, Engelhardia, Alfaropsis, and Oreomunnea, might be associated with a stepwise cooling and a major ice sheet expansion in the Antarctic and Arctic from the late middle Miocene to early Pliocene. In particular, the climatic oscillations during the Quaternary, such as the last glacial maximum, might have led to a decrease in the geographic distribution of Engelhardieae.
关键词	Biogeography Engelhardieae Fossil Fruit Juglandaceae Late Miocene Palaeocarya
DOI	10.1111/jse.12145
收录类别	SCI
语种	英语
WOS记录号	WOS:000363873600003
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/25222
专题	中国科学院东亚植物多样性与生物地理学重点实验室
推荐引用方式 GB/T 7714	Meng,Hong-Hu,Su,Tao,Huang,Yong-Jiang,et al. Late Miocene Palaeocarya (Engelhardieae: Juglandaceae) from Southwest China and its biogeographic implications[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2015,53(6):499-511.
APA	Meng,Hong-Hu,Su,Tao,Huang,Yong-Jiang,Zhu,Hai,&Zhou,Zhe-Kun.(2015).Late Miocene Palaeocarya (Engelhardieae: Juglandaceae) from Southwest China and its biogeographic implications.JOURNAL OF SYSTEMATICS AND EVOLUTION,53(6),499-511.
MLA	Meng,Hong-Hu,et al."Late Miocene Palaeocarya (Engelhardieae: Juglandaceae) from Southwest China and its biogeographic implications".JOURNAL OF SYSTEMATICS AND EVOLUTION 53.6(2015):499-511.

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