Monroe Creek (Type) (Oligocene of the United States)

Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.3° N, 98.0° W)

• coordinate based on political unit

When: Monroe Creek Formation, Monroecreekian (26.3 - 24.8 Ma)

Environment/lithology: terrestrial

Primary reference: O. A. Peterson. 1907. The Miocene Beds of Western Nebraska and Eastern Wyoming and Their Vertebrate Faunae. Annals of Carnegie Museum 4(3):21-72 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 17565: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• "upper" beds only; Peterson's "lower" beds are probable Gering equivalents (see Lower Arikaree Group), although he also shows 200 feet of "Gering Beds" below his 300 feet of "Monroe Creek Beds"
see Hunt 1985a
 Rodentia - Castoridae
Euhapsis platyceps n. sp. Peterson 1905 beaver
from "Upper Monroe Creek beds, near the head of Warbonnet Creek, Sioux Co.": Peterson 1905
 Carnivora - Amphicyonidae
Delotrochanter petersoni3 Hunt 2011 bear-dog
may include "Nothocyon lemur?" and/or "Leptocyon vafer" of Hunt 1985a
Mammacyon sp.2 Loomis 1936 bear-dog
"Monroe Creek Formation, Warbonnet Creek"
 Carnivora - Mustelidae
Promartes darbyi5 Thorpe 1921 mustelid carnivore
 Artiodactyla - Camelidae
Miotylopus gibbi4 Loomis 1911 camel
"Head of Warbonnet Creek, Sioux County"; this may include Peterson's provisionally referred "Protomeryx cedrensis"
 Artiodactyla - Merycoidodontidae
"Merycochoerus carrikeri" = Promerycochoerus carrikeri1, Phenacocoelus typus n. sp.
"Merycochoerus carrikeri" = Promerycochoerus carrikeri1 Peterson 1907 oreodont
Phenacocoelus typus n. sp. Peterson 1907 oreodont
"head of Squaw Creek" (actually head of Warbonnet Creek, see Schultz and Falkenbach 1950); formational assignment follows Hunt 1985a; may include "? Mesoreodon" of Peterson 1905; includes "Phenacocoelus munroensis" type of Peterson 1928b from "head of Warbonnet Creek" (clearly from the same locality as P. typus)