Where: Dawson County, Montana (47.0° N, 104.8° W: paleocoordinates 53.5° N, 77.3° W)

• coordinate stated in text

• outcrop-level geographic resolution

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

• Upper shale interval of the Pierre Shale, zone of Baculites baculus Meek and Hayden and Baculites grandis Hall and Meek

• group of beds-level stratigraphic resolution

Environment/lithology: marine; shale

Size class: macrofossils

Collected by G. A. Bishop in 1966; reposited in the USNM

Primary reference: G. A. Bishop. 1973. Homolopsis dawsonensis: a new crab (Crustacea, Decapoda) fromthe Pierre Shale (Upper Cretaceous, Maastrichtian) of Cedar Creek Anticline, easternMontana. Journal of Paleontology 47(1):19-20 [M. Clapham/H. Shin]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 235354: authorized by Matthew Clapham, entered by Hayden Shin on 02.07.2024

Creative Commons license: CC BY (attribution)