Where: Arizona (34.0° N, 110.2° W: paleocoordinates 7.3° N, 36.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Fort Apache Formation, Kungurian (279.3 - 272.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified limestone

Size class: macrofossils

Reposited in the AMNH

Primary reference: N. D. Newell and D.W. Boyd. 1975. Parallel evolution in early trigonacean bivalves. Bulletin of the American Museum of Natural History 154(2):55-162 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 81514: authorized by Matthew Clapham, entered by Matthew Clapham on 28.06.2008

Creative Commons license: CC BY (attribution)