Where: Montana (48.4° N, 113.7° W: paleocoordinates 51.9° N, 100.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Coal Creek Member (Kishenehn Formation), Lutetian (47.8 - 41.3 Ma)

• Middle sequence of the Coal Creek member of the Kishenehn Formation, which has been estimated to be 46.2 +/- 0.4 myo (Lutetian) by 40Ar/39Ar analysis and 43.5 +/- 4.9 myo by fission-track analysis

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified, carbonaceous shale

Size classes: macrofossils, mesofossils

Preservation: adpression

Collected by Dale Greenwalt; reposited in the USNM

Collection methods: mechanical,

Primary reference: D. E. Greenwalt and J. K. Moulton. 2016. The first fossil New World Dixidae with a critical discussion of generic definitions . Palaeontologia Electronica 19(3.55A):1-32 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 183409: authorized by Matthew Clapham, entered by Matthew Clapham on 17.12.2016

Creative Commons license: CC BY (attribution)