PBDB Collection

Two Buttes: Wasatchian, Wyoming

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Mammalia - Primates - Microsyopidae

	Microsyops scottianus Cope 1881
	= Microsyops cf. scottianus Cope 1881	Gunnell 1989
Mammalia - Primates - Notharctidae

	Notharctus nunienus (Cope 1881)
	= Cantius cf. nunienus Cope 1881	Alroy 2002
Mammalia - Phenacodontidae

	Meniscotherium chamense Cope 1874

	Phenacodus primaevus (Cope 1873)
	= Phenacodus intermedius Granger 1915	Thewissen 1990

	Phenacodus vortmani (Cope 1880)
Mammalia - Perissodactyla

	Hyracotherium craspedotum Cope 1880
	= Perissodactyla indet. Owen 1848	Alroy 2002
	- could be Systemodon tapirinus
Mammalia - Perissodactyla - Brontotheriidae

	Lambdotherium popoagicum Cope 1880
Mammalia - Perissodactyla - Palaeotheriidae

	Hyracotherium vasacciense (Cope 1872)
Mammalia - Perissodactyla

	Heptodon calciculus (Cope 1880)
Mammalia - Diacodexeidae

	Diacodexis cf. secans (Cope 1881)
	= Diacodexis secans Cope 1881	Krishtalka and Stucky 1985
Mammalia - Creodonta - Hyaenodontidae

	? Prototomus sp. Cope 1874
Mammalia - Viverravidae

	Didymictis altidens Cope 1880
Mammalia - Condylarthra - Hyopsodontidae

	Hyopsodus miticulus (Cope 1874)
	= Hyopsodus sp. Leidy 1870	Alroy 2002
see common names

Geography

Country:	United States	State/province:	Wyoming	County:	Sublette
Coordinates:	42.7° North, 110.1° West (view map)
Paleocoordinates:	50.9° North, 83.0° West (Wright 2013)
Basis of coordinate:	based on political unit
Geographic resolution:	small collection

Time

Period:	Paleogene	Epoch:	Eocene
Stage:	Ypresian	10 m.y. bin:	Cenozoic 2
*Period:	Tertiary
Key time interval:	Wasatchian
Age range of interval:	54.9 - 50.5 m.y. ago
* legacy (obsolete) database fields

Stratigraphy

Formation:	Wasatch	Member:	Alkali Creek Tongue
Local section:	GRBsn	Local bed:	2
Local order:	bottom to top
Stratigraphy comments: originally "Western Facies" of the "New Fork Tongue Member"

Lithology and environment

Environment:

terrestrial indet.

Taphonomy

Modes of preservation:

body

Collection methods and comments

Collection size:

37 specimens

Metadata

Also known as:	NF-5
Database number:	15852
Authorizer:	J. Alroy	Enterer:	J. Alroy
Modifier:	J. Alroy	Research group:	vertebrate
Created:	1993-02-18 00:00:00	Last modified:	2025-02-22 15:12:02
Access level:	the public	Released:	1993-02-18 00:00:00
Creative Commons license:	CC0

Reference information

Primary reference:

3596.

R. M. West. 1973. Geology and mammalian paleontology of the New Fork-Big Sandy area, Sublette County, Wyoming. Fieldiana: Geology 29 [J. Alroy/J. Alroy]

Secondary references:

6294		J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
1730		G. F. Gunnell. 1989. Evolutionary History of Microsyopoidea (Mammalia, ?Primates) and the Relationship Between Plesiadapiformes and Primates. University of Michigan Papers on Paleontology 27:1-157 [J. Alroy/J. Alroy/P. Mannion]
2183		L. Krishtalka and R. K. Stucky. 1985. Revision of the Eocene Wind River Faunas, Early Eocene of Central Wyoming. Part 7. Revision of Diacodexis (Mammalian, Artiodactyla). Annals of Carnegie Museum 54(14):413-486 [J. Alroy/J. Alroy/J. Marcot]
3401		J. G. M. Thewissen. 1990. Evolution of Paleocene and Eocene Phenacodontidae (Mammalia, Condylarthra). University of Michigan Papers on Paleontology 29:1-107 [J. Alroy/J. Alroy/P. Mannion]