First fossil pod of Mezoneuron (Caesalpinioideae, Fabaceae) in Asia

doi:10.1016/j.revpalbo.2024.105111

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	First fossil pod of Mezoneuron (Caesalpinioideae, Fabaceae) in Asia
	Zhao, Yi-Shan; Wang, Teng-Xiang; Jia, Lin-Bo; Song, Ai; Huang, Jian; Su, Tao
	2024
发表期刊	REVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN	0034-6667
卷号	325 页码:105111
摘要	The genus Mezoneuron Desf. (Caesalpinioideae, Fabaceae) comprises 23 extant species distributed throughout the Old World tropics and subtropics, yet its fossil record is scarce with finds restricted to Europe and North America. Here, we report a new Mezoneuron pod fossil from the lower Miocene Sanhaogou Formation of Jinggu Basin in Southwest China, representing the first fossil occurrence of this genus in Asia and the only one within its current distribution range. The fossil presents a vascularized wing along the placental suture and with poorly developed, irregular reticulate venation, which are typical pod characters in Mezoneuron . With detailed morphological observation and comparison, it is assigned as a new species, namely M. zhekunii Y.S. Zhao, L.B. Jia et T. Su sp. nov. Together with the historic and modern distribution of Mezoneuron and its relatives, we propose that Mezoneuron originated in the Northern Hemisphere no later than the middle Eocene. Mezoneuron attained relatively low latitudes in Asia no later than the early Miocene, with our fossil representing the lowest latitudinal record. The oblique and fine wrinkles of pod probably suggest a papery texture and low weight observed in mature pods of some extant Mezoneuron species, which favors wind dispersal.
DOI	10.1016/j.revpalbo.2024.105111
WOS记录号	WOS:001231209700001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/76318
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Zhao, Yi-Shan,Wang, Teng-Xiang,Jia, Lin-Bo,et al. First fossil pod of Mezoneuron (Caesalpinioideae, Fabaceae) in Asia[J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2024,325:105111.
APA	Zhao, Yi-Shan,Wang, Teng-Xiang,Jia, Lin-Bo,Song, Ai,Huang, Jian,&Su, Tao.(2024).First fossil pod of Mezoneuron (Caesalpinioideae, Fabaceae) in Asia.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,325,105111.
MLA	Zhao, Yi-Shan,et al."First fossil pod of Mezoneuron (Caesalpinioideae, Fabaceae) in Asia".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 325(2024):105111.

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