Where: Corson County, South Dakota (45.5° N, 100.5° W: paleocoordinates 51.1° N, 74.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pierre Shale Formation, Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Collected by W.H. Over in 1915; reposited in the USNM

• Repository: also at University of South Dakota

Primary reference: M. J. Rathbun. 1917. New species of South Dakota Cretaceous crabs. Proceedings of the United States National Museum 52(2182):385-391 [C. Schweitzer/S. Yost/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 134956: authorized by Carrie Schweitzer, entered by Samantha Yost on 19.10.2012, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)