Where: Box Butte County, Nebraska (42.2° N, 103.1° W: paleocoordinates 42.9° N, 99.2° W)

• coordinate based on political unit

When: Red Valley Member (Box Butte Formation), Hemingfordian (20.4 - 16.0 Ma)

Environment/lithology: terrestrial

Primary reference: T. Galusha. 1975. Bulletin of the American Museum of Natural History 156(1) [J. Alroy/J. Alroy] more details

PaleoDB collection 17895: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)