Steele Butte Breaks: Wasatchian, Wyoming

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Rodentia - Paramyidae
    = Paramyidae indet. Miller and Gidley 1918
Alroy 2002
"Paramys group rodent":
Mammalia - Primates - Microsyopidae
Gunnell 1989
Mammalia - Primates - Notharctidae
Alroy 2002
Mammalia - Phenacodontidae
confirmed by Thewissen 1990
Mammalia - Perissodactyla
Alroy 2002
- could be Systemodon tapirinus
Mammalia - Perissodactyla - Brontotheriidae
Mammalia - Perissodactyla - Palaeotheriidae
Mammalia - Perissodactyla - Hyrachyidae
Mammalia - Perissodactyla
Mammalia - Diacodexeidae
Krishtalka and Stucky 1985
Mammalia - Creodonta - Hyaenodontidae
Tritemnodon sp. Matthew 1906
Mammalia - Creodonta - Oxyaenidae
not discussed by Gunnell 1998a
Oxyaena sp. Cope 1874
    = Oxyaena lupina Cope 1874
Gunnell 1998
Mammalia - Viverravidae
Mammalia - Condylarthra - Hyopsodontidae
    = Hyopsodus sp. Leidy 1870
Alroy 2002
Mammalia
Stylinodontinae indet. Schlosser 1911
Schoch 1986
in part
Mammalia - Coryphodontidae
Mammalia - Esthonychidae
Stylinodontinae indet. Schlosser 1911
    = cf. Trogosus sp. Leidy 1871
Stucky 1984
in part
Mammalia - Dinocerata - Uintatheriidae
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 "Arkosic Facies" of the "New Fork Tongue Member"
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection size:115 specimens
Metadata
Also known as:BS-1
Database number:15839
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]
1735 G. F. Gunnell. 1998. Creodonta. In C. M. Janis, K. M. Scott, and L. L. Jacobs (eds.), Evolution of Tertiary Mammals of North America, Volume 1: Terrestrial Carnivores, Ungulates, and Ungulate like Mammals [J. Alroy/J. Alroy/J. Orcutt]
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]
3053 R. M. Schoch. 1986. Systematics, Functional Morphology and Macroevolution of the Extinct Mammalian Order Taeniodonta. Peabody Museum of Natural History Bulletin 42:1-320 [J. Alroy/J. Alroy/M. Uhen]
3331 R. K. Stucky. 1984. The Wasatchian-Bridgerian Land Mammal Age boundary (early to middle Eocene) in western North America. Annals of Carnegie Museum 53(12):347-382 [J. Alroy/J. Alroy/J. Alroy]