UNSM Sx-20 (Whitney A) (Oligocene of the United States)
Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.4° N, 96.3° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Whitney A Member (Brule Formation), Whitneyan (33.3 - 30.8 Ma)
Environment/lithology: terrestrial
Reposited in the UNSM
Primary reference: T. H. Heaton. 1993. The Oligocene Rodent Ischyromys of the Great Plains: Replacement Mistaken for Anagenesis. Journal of Paleontology 67(2) [J. Alroy/J. Alroy/J. Ju]more details
PaleoDB collection 17414: authorized by John Alroy, entered by John Alroy on 05.08.1996
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Mammalia | |
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Miniochoerus starkensis Schultz and Falkenbach 1956 oreodont | |
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Ischyromys typus Leidy 1856 rodent | |