Where: Colorado (39.5° N, 108.0° W: paleocoordinates 43.3° N, 94.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified mudstone

Size class: macrofossils

Preservation: adpression

Reposited in the USNM

Primary reference: C. S. Chaboo and M. S. Engel. 2009. Eocene tortoise beetles from the Green River Formation in Colorado, U.S.A. (Coleoptera: Chrysomelidae: Cassidinae). Systematic Entomology 34:202-209 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 138990: authorized by Matthew Clapham, entered by Matthew Clapham on 06.02.2013

Creative Commons license: CC BY (attribution)