Also known as Quarry Z

Where: Niobrara County, Wyoming (43.0° N, 104.5° W: paleocoordinates 43.9° N, 99.4° W)

• coordinate based on political unit

• small collection-level geographic resolution

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

• said to be late Arikareean

Environment/lithology: terrestrial

Primary reference: J. H. Wahlert and R. A. Souza. 1988. Skull morphology of Gregorymys and relationships of the Entoptychinae (Rodentia, Geomyidae). American Museum Novitates 2922:1-13 [J. Alroy/J. Alroy/J. Marcot] more details

PaleoDB collection 17794: authorized by John Alroy, entered by John Alroy on 07.06.1994, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)