Phylogeny and paleobiogeography of the enigmatic North American primate <i>Ekgmowechashala</i> illuminated by new fossils from Nebraska (USA) and Guangxi Zhuang Autonomous Region (China)

doi:10.1016/j.jhevol.2023.103452

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	*Phylogeny and paleobiogeography of the enigmatic North American primate Ekgmowechashala* illuminated by new fossils from Nebraska (USA) and Guangxi Zhuang Autonomous Region (China)**
	Rust, Kathleen 1,2; Ni, Xijun3,4 ; Tietjen, Kristen 1; Beard, K. Christopher 1,2
	2023-12-01
发表期刊	JOURNAL OF HUMAN EVOLUTION
ISSN	0047-2484
卷号	185 期号:0 页码:19
摘要	Ekgmowechashala is a poorly documented but very distinctive primate known only from the late early Oligocene (early Arikareean) of western North America. Because of its highly autapomorphous dentition and spatiotemporal isolation, the phylogenetic and biogeographic affinities of Ekgmowechashala have long been debated. Here, we describe the oldest known fossils of Ekgmowechashala from the Brown Siltstone Beds of the Brule Formation, White River Group of western Nebraska. We also describe a new ekgmowechashaline taxon from the Nadu Formation (late Eocene) in the Baise Basin of Guangxi Zhuang Autonomous Region in southern China. Phylogenetic analysis suggests that North American Ekgmowechashala and the new Chinese taxon are sister taxa that are nested within a radiation of southern Asian adapiforms that also includes Gatanthropus, Muangthanhinius, and Bugtilemur. The new Chinese ekgmowechashaline helps fill the considerable disparity in dental morphology between Ekgmowechashala and more primitive ekgmowechashalids known from southern Asia. Our study underscores the fundamental role of southern Asia as a refugium for multiple primate clades during the cooler and drier climatic regime that prevailed after the Eocene-Oligocene transition. The colonization of North America by Ekgmowechashala helps define the beginning of the Arikareean Land Mammal Age and corresponds to an example of the Lazarus effect, whereby a taxon (in this case, the order Primates) reappears suddenly in the fossil record after a lengthy hiatus.
关键词	Ekgmowechashalidae Adapiformes Paleobiogeography Dental evolution Lazarus effect
DOI	10.1016/j.jhevol.2023.103452
关键词[WOS]	EOCENE-OLIGOCENE TRANSITION ; JOHN-DAY-FORMATION ; DENTITION ; LAND ; ARTIODACTYLA ; EVOLUTION ; MAMMALIA ; AFRICAN ; MIOCENE ; ORIGIN
收录类别	SCI
语种	英语
资助项目	David B. Jones Foundation###2735 ; NSF[9615557]###2734 ; NSF[9221231]###2733
WOS研究方向	Anthropology ; Evolutionary Biology
WOS类目	Anthropology ; Evolutionary Biology
WOS记录号	WOS:001125612600001
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/23280
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Beard, K. Christopher
作者单位	1.Univ Kansas, Biodivers Inst, 1345 Jayhawk Blvd, Lawrence, KS 66045 USA 2.Univ Kansas, Dept Ecol & Evolutionary Biol, Lawrence, KS 66045 USA 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol IVPP, Key Lab Vertebrate Evolut & Human Origins, 142 Xi Zhi Men Wai St, Beijing 100044, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Rust, Kathleen,Ni, Xijun,Tietjen, Kristen,et al. Phylogeny and paleobiogeography of the enigmatic North American primate Ekgmowechashala illuminated by new fossils from Nebraska (USA) and Guangxi Zhuang Autonomous Region (China)[J]. JOURNAL OF HUMAN EVOLUTION,2023,185(0):19.
APA	Rust, Kathleen,Ni, Xijun,Tietjen, Kristen,&Beard, K. Christopher.(2023).Phylogeny and paleobiogeography of the enigmatic North American primate Ekgmowechashala illuminated by new fossils from Nebraska (USA) and Guangxi Zhuang Autonomous Region (China).JOURNAL OF HUMAN EVOLUTION,185(0),19.
MLA	Rust, Kathleen,et al."Phylogeny and paleobiogeography of the enigmatic North American primate Ekgmowechashala illuminated by new fossils from Nebraska (USA) and Guangxi Zhuang Autonomous Region (China)".JOURNAL OF HUMAN EVOLUTION 185.0(2023):19.

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