Where: Cerro Gordo County, Iowa (43.2° N, 93.2° W: paleocoordinates 29.0° S, 37.7° W)

When: Shell Rock Formation (Cedar Valley Group), Frasnian (382.7 - 372.2 Ma)

• punctata to Early hassi

Environment/lithology: marine

Reposited in the USNM

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 55111: authorized by Alycia Stigall, entered by Alycia Stigall on 27.09.2005

Creative Commons license: CC BY (attribution)