Where: Pennington County, South Dakota (43.8° N, 102.6° W: paleocoordinates 45.1° N, 93.7° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

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

• "in the Titanotherium beds, 134 feet above the Pierre Shales and 58 feet below the Oreodon beds"

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by H. Schlaikjer, E. Schlaikjer in 1925; reposited in the MCZ

Primary reference: T. Barbour. 1926. A note on Tertiary alligators. Copeia 151:109-111 [J. Alroy/J. Alroy] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 99855: authorized by John Alroy, entered by John Alroy on 25.11.2010

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)