Where: Colorado (39.6° N, 108.2° W: paleocoordinates 43.4° N, 94.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Green River Formation, Bridgerian (50.3 - 46.2 Ma)

Environment/lithology: lacustrine - large; diatomite

Size class: macrofossils

Preservation: mold/impression

Collected by T.D.A. Cockerell, J. Byram, Mrs. Cockerell in 1922; reposited in the UCM, USNM

Primary reference: T. D. A. Cockerell. 1923. The earliest known ponerine ant. The Entomologist 56:51-52 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 114007: authorized by Matthew Clapham, entered by Jered Karr on 08.08.2011, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)