Sixty Six Mountain (Lower) ( of the United States)

Where: Goshen County, Wyoming (42.0° N, 104.2° W: paleocoordinates 42.9° N, 98.4° W)

• coordinate based on political unit

When: Arikareean (30.8 - 20.4 Ma)

Environment/lithology: terrestrial

Primary reference: C. C. Black. 1961. New rodents from the early Miocene deposits of SixtySix Mountain, Wyoming. Breviora 146 [J. Alroy/J. Alroy/J. Ju]more details

PaleoDB collection 17666: authorized by John Alroy, entered by John Alroy on 26.07.1994

Creative Commons license: CC BY (attribution)

Taxonomic list

• from the "Brule clay" of Schlaikjer 1935b, which Black believes to be a Gering equivalent and therefore presumably what Schlaikjer calls lowermost "Harrison" in other parts of the Goshen Hole
entirely from a locality at the far western edge of the mountain not discussed by Schlaikjer
NISP 6
Mammalia
 Artiodactyla - Merycoidodontidae
"Cyclopidius sp." = Leptauchenia, "Mesoreodon cheeki" = Mesoreodon minor
"Cyclopidius sp." = Leptauchenia Leidy 1856 oreodont
"Mesoreodon cheeki" = Mesoreodon minor Douglass 1903 oreodont
 Rodentia - Heteromyidae
"Heliscomys schlaikjeri n. sp." = Proharrymys schlaikjeri
"Heliscomys schlaikjeri n. sp." = Proharrymys schlaikjeri Black 1961 rodent
redescribed by Wahlert 1984
 Rodentia - Cricetidae
Eumys cf. elegans Leidy 1856 mouse
Scottimus kellamorum n. sp. Black 1961 mouse