Willow Creek ( of the United States)

Where: Niobrara County, Wyoming (43.0° N, 104.5° W: paleocoordinates 43.9° N, 98.7° W)

• coordinate based on political unit

When: Arikareean (30.8 - 20.4 Ma)

Environment/lithology: terrestrial

Primary reference: J. H. Wahlert. 1983. Relationships of the Florentiamyidae (Rodentia, Geomyoidea) based on cranial and dental morphology. American Museum Novitates 2769:1-23 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 17727: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Jonathan Marcot and Clint Boyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• based on Prothero 1996d, this appears to be a general term that includes Horse Creek
Mammalia
 Rodentia - Florentiamyidae
Florentiamys kingi4 Wahlert 1983 rodent
 Artiodactyla - Camelidae
Miotylopus taylori n. sp.5 Prothero 1996 camel
"Willow Creek area, Goshen County"
 Artiodactyla - Hypertragulidae
Nanotragulus loomisi3 Lull 1922 ruminant
"Willow Creek"
 Artiodactyla - Merycoidodontidae
"Mesoreodon minor" = Mesoreodon minor1, "Desmatochoerus (Paradesmatochoerus) wyomingensis n. sp." = Mesoreodon minor6, Sespia nitida7, Leptauchenia major7, "Merycochoerus superbus" = Promerycochoerus superbus1
"Mesoreodon minor" = Mesoreodon minor1 Douglass 1903 oreodont
"Desmatochoerus (Paradesmatochoerus) wyomingensis n. sp." = Mesoreodon minor6 Douglass 1903 oreodont
F:AM 33312
Sespia nitida7 Leidy 1869 oreodont
Leptauchenia major7 Leidy 1856 oreodont
"upper Gering" equivalent
"Merycochoerus superbus" = Promerycochoerus superbus1 Leidy 1870 oreodont
 Carnivora - Canidae
Archaeocyon leptodus8 Schlaikjer 1935 bone-crushing dog
Aves
 Gruiformes - Bathornithidae
Bathornis fricki n. sp.2 Cracraft 1968 bird
"from an approximate Gering equivalent" on "Willow Creek, near Lusk... collected in 1938 by C. H. Falkenbach"