Where: Wyoming (42.9° N, 108.9° W: paleocoordinates 34.5° N, 49.3° W)

When: Gypsum Spring Formation, Bajocian (170.3 - 168.3 Ma)

• Probably Bajocian

• bed-level stratigraphic resolution

Environment/lithology: marine; red shale and dolomite

Size class: mesofossils

Collected by J.B. Reeseide, Jr. and D. Love in 1944; reposited in the USNM

Primary reference: T. P. Poulton. 1979. Jurassic Trigoniid Bivalves from Canada and Western United States of America. Geological Survey of Canada Bulletin 282 [G. Stanley/H. Shepherd/H. Shepherd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 139492: authorized by George Stanley, entered by Hannah Shepherd on 12.02.2013

Creative Commons license: CC BY (attribution)