Where: Colorado (39.5° N, 108.4° W: paleocoordinates 44.1° N, 93.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Green River Formation, Early/Lower Eocene (55.8 - 48.6 Ma)

Environment/lithology: lacustrine - large; shale

Size classes: macrofossils, mesofossils

Preservation: mold/impression, adpression

Collected by Winchester in 1917; reposited in the USNM

• Sept. 26, 1917 (Winchester 17-8. U.S.G.S.)

Primary reference: T. D. A. Cockerell. 1921. Eocene Insects from the Rocky Mountains. Proceedings of the United States National Museum 57:233-260 [C. Labandeira/C. Labandeira/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 121194: authorized by Matthew Clapham, entered by Jered Karr on 30.11.2011, edited by Alex Aguilar and Matthew Clapham

Creative Commons license: CC BY (attribution)