North Fork of the Shoshone River (NF-1) (Eocene of the United States)

Where: Park County, Wyoming (44.3° N, 109.0° W: paleocoordinates 49.2° N, 91.9° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Willwood Formation, Lostcabinian (55.8 - 50.3 Ma)

• said to be Lostcabinian

Environment/lithology: terrestrial

Primary reference: G. F. Gunnell, W. S. Bartels, P. D. Ginberich and V. Torres. 1992. Wapiti Valley Faunas: Early and Middle Eocene Fossil Vertebrates from the North Fork of the Shoshone River, Park County, Wyoming. Contributions from the Museum of Paleontology, University of Michigan 28(11):247-287 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 15997: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• stratigraphic level is unclear; Torres 1985 places it at 80 meters, but Gunnell et al. correlate it at above 100 m without giving details
Mammalia
 Primates - Microsyopidae
Microsyops scottianus Cope 1881 primate
 Primates - Omomyidae
Loveina wapitiensis Gunnell et al. 1992 tarsier
 Perissodactyla - Brontotheriidae
Lambdotherium popoagicum Cope 1880 brontothere
 Perissodactyla - Equidae
Xenicohippus cf. craspedotum1, "Protorohippus cf. venticolus" = Protorohippus venticolum1
"Protorohippus cf. venticolus" = Protorohippus venticolum1 Cope 1881 horse
 Theriamorpha - Phenacodontidae
Phenacodus vortmani Cope 1880 condylarth
Phenacodus intermedius Granger 1915 condylarth
 Artiodactyla - Diacodexeidae
Diacodexis cf. secans Cope 1881 even-toed ungulate
Bunophorus sinclairi Guthrie 1966 even-toed ungulate
 Condylarthra - Hyopsodontidae
Hyopsodus sp.1 Leidy 1870 condylarth
 Cimolesta - Esthonychidae
Esthonyx cf. acutidens Cope 1881 tillodont
Reptilia
 Crocodylia - Alligatoridae
Allognathosuchus sp.2 Mook 1921 crocodilian
Echmatemys wyomingensis
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