Lower Monroe Creek ( 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: Arikareean (29.5 - 18.5 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 17539: authorized by John Alroy, entered by John Alroy on 26.03.1995
Creative Commons license: CC BY (attribution)
Taxonomic list
• "definitely" in the lower Arikaree Group according to Hunt 1985a, which implies equivalence with UNSM Dw-108 and Wagner Quarry
stratigraphic position of "? Mesoreodon" and "Leptauchenia" from the "Gering Beds" of "Sand Creek and near Chadron, Nebraska" is unclear
"Hypertragulus sequens" Cook 1934: type, "Monroe Creek beds, near Monroe Creek, north of Harrison, Nebraska, about 100 feet above the top of the Brule"; based on Peterson's section, this should be in the Gering instead, or possibly even the Upper Brown Siltstone
stratigraphic position of "? Mesoreodon" and "Leptauchenia" from the "Gering Beds" of "Sand Creek and near Chadron, Nebraska" is unclear
"Hypertragulus sequens" Cook 1934: type, "Monroe Creek beds, near Monroe Creek, north of Harrison, Nebraska, about 100 feet above the top of the Brule"; based on Peterson's section, this should be in the Gering instead, or possibly even the Upper Brown Siltstone
Show authors, comments, and common names
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Leptauchenia sp., "Mesoreodon megalodon n. sp." = Desmatochoerus megalodon
Leptauchenia sp. Leidy 1856 oreodont confirmed by Hunt 1985a; not clear if this includes "Sespia ultima" of Schultz and Falkenbach 1968 from the "Monroe Creek" as no specimens are discussed by the other authors and the material may be from the upper beds
"Mesoreodon megalodon n. sp." = Desmatochoerus megalodon Peterson 1907 oreodont said to be from "near Squaw Butte, head of Warbonnet Creek" by Schultz and Falkenbach 1949
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