Where: Alpena County, Michigan (45.1° N, 83.1° W: paleocoordinates 33.7° S, 28.9° W)

When: Potter Farm Formation (Traverse Group), Givetian (388.1 - 383.7 Ma)

• varcus

Environment/lithology: marine

Reposited in the YPM

Primary reference: A. L. Rode and B. S. Lieberman. 2004. Using GIS to unlock the interactions between biogeography, environment, and evolution in middle and Late Devonian brachiopods and bivalves. Palaeogeography, Palaeoclimatology, Palaeoecology 211(3-4):345-359 [A. Stigall/A. Stigall/A. Stigall] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 55143: authorized by Alycia Stigall, entered by Alycia Stigall on 27.09.2005