An early to middle Uintan (Ui1b-Ui2) mammalian fauna from the upper unit of the middle Eocene Adobe Town Member, Washakie Formation (Wyoming, USA)

doi:10.1080/02724634.2025.2570730

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	An early to middle Uintan (Ui1b-Ui2) mammalian fauna from the upper unit of the middle Eocene Adobe Town Member, Washakie Formation (Wyoming, USA)
	Mccarroll, Steven M.1; Tomiya, Susumu 1,2,3; Dunn, Rachel H.4; Zack, Shawn P.5,6; Wood, Melissa C.7; Bai, Bin8 ; Turnbull, William D.1; Flynn, John J.1,9,10
	2025-11-21
发表期刊	JOURNAL OF VERTEBRATE PALEONTOLOGY
ISSN	0272-4634
页码	20
通讯作者	Tomiya, Susumu(tomiya.susumu.8r@kyoto-u.ac.jp)
摘要	The mammalian fossil record of the middle Eocene Washakie Formation of Wyoming, U.S.A., has provided important insights into both climatic (cooling and drying) and associated biotic changes during an early phase of the Eocene-Oligocene transition within a single depositional basin. However, only provisional assessments of the biochronological age of its uppermost unit, Twka3 of the Adobe Town Member, have been made, without formal description of most of the fossil material from there. Here we document all mammalian specimens that are currently known from Twka3 and can be identified at the taxonomic level of suborder or below. They represent 12 taxa of Cimolesta, Primates, Rodentia, Hyaenodonta, Carnivoramorpha, Artiodactyla, and Perissodactyla. Based on the updated taxon occurrence data, we propose an early to middle Uintan (Ui1b-Ui2) North American Land Mammal 'Age' for the lower part of Twka3. Although the fossil mammal sample from Twka3 is much smaller than those from the underlying upper Bridgerian to lower Uintan (Br3-Ui1b) aged units of the Adobe Town Member, it enhances the resolution of faunal transition data for the middle Eocene of the central Rocky Mountain region, uniquely contributing to our understanding of regional mammalian diversity dynamics against the backdrop of contracting lake systems and climate-driven cooling and drying. Recovery of primate and pantolestid material in this small sample is surprising given their virtual absence in the much better-sampled lower Uintan (Ui1b) portion of the underlying Twka2, hinting at complexity of the local environmental history within a broader regional trend of contracting lake systems and forests.
DOI	10.1080/02724634.2025.2570730
关键词[WOS]	SESPE UPPER EOCENE ; MARSH-COLLECTION ; PRIMATES ; PERISSODACTYLA ; CARNIVORAMORPHA ; RECONSTRUCTION ; SYSTEMATICS ; MORPHOLOGY ; PARAMYINAE ; PHYLOGENY
收录类别	SCI
语种	英语
资助项目	Paleontological Society, Society for Sedimentary Geology###3579 ; University of Chicago Department of the Geophysical Sciences[PA21-WY-285]###3580 ; U.S. National Science Foundation Collections in Support of Biological Research grant[DBI-1203530]###3581 ; JSPS KAKENHI[JP22KK0048]###3582 ; JSPS KAKENHI[RRID:SCR_026255]###3583 ; [61725]###3584
项目资助者	Paleontological Society, Society for Sedimentary Geology ; University of Chicago Department of the Geophysical Sciences ; U.S. National Science Foundation Collections in Support of Biological Research grant ; JSPS KAKENHI
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:001619929100001
出版者	TAYLOR & FRANCIS INC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/25180
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Tomiya, Susumu
作者单位	1.Field Museum Nat Hist, Chicago, IL 60605 USA 2.Kyoto Univ, Ctr Int Collaborat & Adv Studies Primatol, Ctr Evolutionary Origins Human Behav, Inuyama, Aichi 4848506, Japan 3.Univ Calif Berkeley, Museum Paleontol, Berkeley, CA 94720 USA 4.Moines Univ, Dept Anat, W Des Moines, IA 50266 USA 5.Univ Arizona, Coll Med Phoenix, Dept Basic Med Sci, Phoenix, AZ 85004 USA 6.Arizona State Univ, Sch Human Evolut & Social Change, Tempe, AZ 85281 USA 7.Univ Chicago, Dept Geophys Sci, Chicago, IL 60637 USA 8.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 9.Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA 10.Richard Gilder Grad Sch, Amer Museum Nat Hist, New York, NY 10024 USA
推荐引用方式 GB/T 7714	Mccarroll, Steven M.,Tomiya, Susumu,Dunn, Rachel H.,et al. An early to middle Uintan (Ui1b-Ui2) mammalian fauna from the upper unit of the middle Eocene Adobe Town Member, Washakie Formation (Wyoming, USA)[J]. JOURNAL OF VERTEBRATE PALEONTOLOGY,2025:20.
APA	Mccarroll, Steven M..,Tomiya, Susumu.,Dunn, Rachel H..,Zack, Shawn P..,Wood, Melissa C..,...&Flynn, John J..(2025).An early to middle Uintan (Ui1b-Ui2) mammalian fauna from the upper unit of the middle Eocene Adobe Town Member, Washakie Formation (Wyoming, USA).JOURNAL OF VERTEBRATE PALEONTOLOGY,20.
MLA	Mccarroll, Steven M.,et al."An early to middle Uintan (Ui1b-Ui2) mammalian fauna from the upper unit of the middle Eocene Adobe Town Member, Washakie Formation (Wyoming, USA)".JOURNAL OF VERTEBRATE PALEONTOLOGY (2025):20.