Where: Morrill County, Nebraska (41.7° N, 103.1° W: paleocoordinates 42.0° N, 101.4° W)

• coordinate based on political unit

When: Clarendonian to Clarendonian (12.5 - 2.6 Ma)

Environment/lithology: fluvial; conglomerate

Size class: macrofossils

Collected by S. R. Sweet, T. C. Middleswart, and W. F. Chaloupka in 1937; reposited in the UNSM

Collection methods: surface (in situ),

Primary reference: E. H. Barbour and C. B. Schultz. 1941. A New Species of Sphenophalos from the Upper Ogallala of Nebraska. Bulletin of the Nebraska State Museum 2(6):59-62 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 18030: authorized by John Alroy, entered by John Alroy on 15.05.2002

Creative Commons license: CC BY (attribution)