Hole in the Rock ( of the United States)

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

• coordinate based on political unit

When: Harrison Formation, Harrisonian (24.8 - 18.5 Ma)

Environment/lithology: terrestrial

Primary reference: T. H. V. Rich. 1981. Origin and History of the Erinaceinae and Brachyericinae (Mammalia, Insectivora) in North America. Bulletin of the American Museum of Natural History 171(1):1-116 [J. Alroy/J. Alroy/P. Mannion]more details

PaleoDB collection 17792: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Jason Head

Creative Commons license: CC BY (attribution)

Taxonomic list

• this is presumably the Harrison sensu stricto because Rich recognizes the Upper Harrison as a distinct unit
anthill collection
Mammalia
 Theriamorpha - Erinaceidae
Parvericius montanus Koerner 1940 hedgehog
Reptilia
 Squamata - Colubridae
Colubridae indet. Oppel 1811 colubrid snake
 Squamata - Boidae
Erycinae indet. Bonaparte 1825 sand boa