Where: Madison County, Montana (45.2° N, 112.2° W: paleocoordinates 46.6° N, 104.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Passamari Member (Renova Formation), Whitneyan (33.3 - 30.8 Ma)

• Whitneyan North American land mammal age according to Wing, 1987.

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified shale

Size class: mesofossils

Preservation: adpression

Collected by John Wulf, John Alley

• Repository: collection of John Alley, Butte, Montana

Primary reference: S. E. Lewis. 1971. Three new species of fossil Diptera (Bibionidae) from the Ruby River Basin (Oligocene) of Southwestern Montana. Annals of the Entomological Society of America 64(6):1464-1466 [M. Clapham/J. Karr]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 120622: authorized by Matthew Clapham, entered by Jered Karr on 18.11.2011, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)