Where: Blaine County, Montana (47.8° N, 108.9° W: paleocoordinates 54.7° N, 75.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Judith River Formation (Montana Group), Middle Campanian to Middle Campanian (83.5 - 70.6 Ma)

• 1500-1600 feet below top of formation, 500-600 feet below level of Ceratops

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by J. B. Hatcher in 1888; reposited in the USNM

Collection methods: quarrying, surface (float), surface (in situ), mechanical,

Primary reference: O. C. Marsh. 1890. Description of new dinosaurian reptiles. The American Journal of Science, series 3 39:81-86 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 49001: authorized by Matthew Carrano, entered by Matthew Carrano on 05.04.2005

Creative Commons license: CC BY (attribution)