Where: South Dakota (43.6° N, 99.4° W: paleocoordinates 47.1° N, 64.3° W)

When: Late/Upper Cretaceous (100.5 - 66.0 Ma)

Environment/lithology: marine; lithified, sandy shale

Size class: macrofossils

Primary reference: R. W. Meredith, J. E. Martin, and P. N. Wegleitner. 2007. The largest mosasaur (Squamata: Mosasauridae) from the Missouri River area (Late Cretaceous; Pierre Shale Group) of South Dakota and its relationship to Lewis and Clark. 209-214 [M. Uhen/C. Ruken]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 232419: authorized by Mark Uhen, entered by Casey Ruken on 19.11.2023

Creative Commons license: CC BY (attribution)