Where: Wyoming (43.3° N, 110.8° W: paleocoordinates 15.8° N, 31.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Shedhorn Formation, Wordian (268.0 - 265.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified sandstone

Size class: macrofossils

Preservation: mold/impression

Primary reference: K.W. Ciriacks. 1963. Permian and Eotriassic bivalves of the middle Rockies. Bulletin of the American Museum of Natural History 125(1):1-100 [M. Clapham/M. Clapham] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 105280: authorized by Matthew Clapham, entered by Matthew Clapham on 18.02.2011

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)