Where: Pennington County, South Dakota (43.8° N, 102.7° W: paleocoordinates 45.1° N, 93.8° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Chadron Formation, Chadronian (37.2 - 33.9 Ma)

Environment/lithology: fluvial-lacustrine; siliciclastic sediments

Size class: macrofossils

Reposited in the SDSM

Primary reference: F. B. Loomis. 1904. Two new river reptiles from the Titanothere beds. American Journal of Science 18:427-432 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 99711: authorized by John Alroy, entered by John Alroy on 19.11.2010

Creative Commons license: CC BY (attribution)