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 John Byram

Primary reference: T. D. A. Cockerell. 1924. An ancestor of the Agromyzidae. The Entomologist 57:199-201 [C. Labandeira/C. Labandeira/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 160457: authorized by Matthew Clapham, entered by Matthew Clapham on 22.08.2014

Creative Commons license: CC BY (attribution)