Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.1° N, 99.9° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: middle Member (Sheep Creek Formation), Hemingfordian (20.4 - 16.0 Ma)
Environment/lithology: terrestrial
Primary reference: M. F. Skinner, S. M. Skinner, and R. J. Gooris. 1977. Stratigraphy and biostratigraphy of late Cenozoic deposits in central Sioux County, western Nebraska. Bulletin of the American Museum of Natural History 158(5):263-370 [J. Alroy/J. Alroy/J. Alroy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 17987: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
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Archaeohippus penultimus Matthew 1924 anchitheriine horse | |
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Merychyus relictus Matthew and Cook 1909 oreodont | |
"Prosthennops xiphodonticus" = Stirtonhyus xiphodonticus4
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