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 17952: 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 | |
| |
| |
Archaeohippus penultimus Matthew 1924 anchitheriine horse
Merychippus primus Osborn 1918 horse | |
cf. Lambdoceras sp. Stirton 1967 protoceratid "cf. Prosynthetoceras (Lambdoceras) siouxensis": Patton and Taylor 1971; based on discussion species-level referral is impossible
| |
| |
| |
Merychyus relictus, "Brachycrus wilsoni" = Brachycrus laticeps
"Brachycrus wilsoni" = Brachycrus laticeps Douglass 1900 oreodont | |
| |
|