Below Princeton Quarry (Paleocene of the United States)

Also known as MCZ 1/77WYO

Where: Park County, Wyoming (44.3° N, 109.0° W: paleocoordinates 50.2° N, 88.7° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Tiffanian (61.7 - 56.8 Ma)

Environment/lithology: terrestrial

Primary reference: R. L. Cifelli, C. R. Schaff, and M. C. McKenna. 1989. The relationships of the Arctostylopidae (Mammalia): new data and interpretation. Bulletin of the Museum of Comparative Zoology 152(1):1-44 [J. Alroy/J. Alroy/P. Mannion]more details

PaleoDB collection 15009: authorized by John Alroy, entered by John Alroy on 21.09.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• 5 m from the quarry and 2.5 m below it
Mammalia
 Theriamorpha - Arctostylopidae
Arctostylops steini Matthew 1915 placental