Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.3° N, 98.8° W)

• coordinate based on political unit

When: Lower Harrison Beds Formation, Harrisonian (24.8 - 20.4 Ma)

Environment/lithology: terrestrial

Primary reference: O. A. Peterson. 1910. Memoirs of the Carnegie Museum 4(5) [J. Alroy/J. Alroy] more details

PaleoDB collection 17857: authorized by John Alroy, entered by John Alroy on 26.03.1995

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