Where: Brown County, Nebraska (42.7° N, 100.0° W: paleocoordinates 43.3° N, 96.7° W)
• coordinate based on political unit
When: Crookston Bridge Member (Valentine Formation), Barstovian (16.0 - 13.6 Ma)
• bed-level stratigraphic resolution
Environment/lithology: terrestrial; lithology not reported
Size class: macrofossils
Primary reference: M. F. Skinner. 1968. A Pliocene chalicothere from Nebraska, and the distribution of chalicotheres in the late Tertiary of North America. American Museum Novitates 2346:1-24 [J. Alroy/J. Alroy/J. Marcot]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 18216: authorized by John Alroy, entered by John Alroy on 05.08.1992, edited by Jonathan Marcot
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
Proboscidea indet. proboscidean | |
| |
Pseudhipparion retrusum Cope 1889 hipparionine horse | |
| |
| |
"Merychyus medius" = Ustatochoerus medius2
| |
Eucastor sp. Allen 1877 beaver
Eucastor tortus Leidy 1858 beaver |