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
Mammalia
 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)