Where: South Dakota (44.9° N, 100.4° W: paleocoordinates 50.6° N, 73.6° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Pierre Shale Formation (Montana Group), Maastrichtian (72.1 - 66.0 Ma)

• "Very top of Pierre Shale and just below Fox Hills sandstone" [This seems unlikely, at least if the geographic description is accurate, because the Fox Hills is exposed more than 25 km to the west. If it really is the uppermost Pierre Shale, it should be early Late Maastrichtian in age.]

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Collected by William L. Russell in 1927

• Repository: Geological Museum at the University of South Dakota in Vermilion

Primary reference: M. J. Rathbun. 1930. A new Callianassa from the Cretaceous of South Dakota. Journal of the Washington Academy of Sciences 20(1):1-3 [C. Schweitzer/S. Yost]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 135805: authorized by Carrie Schweitzer, entered by Samantha Yost on 09.11.2012

Creative Commons license: CC BY (attribution)