PBDB Collection

Steele Butte Breaks (Eocene of the United States)

Also known as BS-1

Where: Sublette County, Wyoming (42.7° N, 110.1° W: paleocoordinates 47.7° N, 93.5° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Alkali Creek Tongue Member (Wasatch Formation), Wasatchian (55.8 - 50.3 Ma)

• originally "Arkosic Facies" of the "New Fork Tongue Member"

Environment/lithology: terrestrial

Primary reference: 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]more details

PaleoDB collection 15839: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Mammalia
Theriamorpha - Stylinodontidae	Stylinodon sp.⁵ Stylinodon sp.⁵ Marsh 1874 taeniodont
Cimolesta - Coryphodontidae	Coryphodon sp. Coryphodon sp. Owen 1845 pantodont
Cimolesta - Esthonychidae	cf. Trogosus sp.⁶ cf. Trogosus sp.⁶ Leidy 1871 tillodont
Condylarthra - Hyopsodontidae	Hyopsodus sp.¹, Hyopsodus wortmani Hyopsodus sp.¹ Leidy 1870 condylarth Hyopsodus wortmani Osborn 1902 condylarth
Creodonta - Hyaenodontidae	Tritemnodon sp., ? Prototomus sp. Tritemnodon sp. Matthew 1906 creodont ? Prototomus sp. Cope 1874 creodont
Creodonta - Oxyaenidae	Oxyaena forcipata, Oxyaena lupina³ Oxyaena forcipata Cope 1874 creodont not discussed by Gunnell 1998a Oxyaena lupina³ Cope 1874 creodont
Theriamorpha - Viverravidae	Didymictis altidens Didymictis altidens Cope 1880 placental
Placentalia -	Perissodactyla indet.¹ Perissodactyla indet.¹ Owen 1848 odd-toed ungulate
Perissodactyla - Palaeotheriidae	Hyracotherium vasacciense Hyracotherium vasacciense Cope 1872 odd-toed ungulate
Perissodactyla - Brontotheriidae	Lambdotherium popoagicum Lambdotherium popoagicum Cope 1880 brontothere
Perissodactyla - Hyrachyidae	Hyrachyus modestus Hyrachyus modestus Leidy 1870 odd-toed ungulate
Perissodactyla -	Heptodon posticus, Heptodon calciculus Heptodon posticus Cope 1882 odd-toed ungulate Heptodon calciculus Cope 1880 odd-toed ungulate
Theriamorpha - Phenacodontidae	Meniscotherium chamense, Phenacodus vortmani Meniscotherium chamense Cope 1874 condylarth Phenacodus vortmani Cope 1880 condylarth confirmed by Thewissen 1990
Artiodactyla - Diacodexeidae	Diacodexis secans⁴ Diacodexis secans⁴ Cope 1881 even-toed ungulate
Rodentia - Paramyidae	Paramyidae indet.¹ Paramyidae indet.¹ Miller and Gidley 1918 rodent
Primates - Notharctidae	Cantius cf. nunienus¹ Cantius cf. nunienus¹ Cope 1881 primate
Primates - Microsyopidae	Microsyops cf. scottianus² Microsyops cf. scottianus² Cope 1881 primate
Dinocerata - Uintatheriidae	Bathyopsis fissidens Bathyopsis fissidens Cope 1881 uintathere

¹Alroy 2002; ²Gunnell 1989; ³Gunnell 1998; ⁴Krishtalka and Stucky 1985; ⁵Schoch 1986; ⁶Stucky 1984