Where: Montana (45.8° N, 111.8° W)

• Paleocoordinates: 27.8° N, 32.3° W (Wright 2013)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Shedhorn Formation, Capitanian (264.3 - 259.5 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 105345: authorized by Matthew Clapham, entered by Matthew Clapham on 19.02.2011

Creative Commons license: CC0 (CC0)