Also known as L&W locality 17c

Where: Chouteau County, Montana (47.9° N, 109.7° W: paleocoordinates 55.0° N, 75.8° 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)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by S. F. Peckham in 1880; reposited in the YPM

Primary reference: O. C. Marsh. 1889. Notice of new American Dinosauria. The American Journal of Science and Arts, series 3 38:331-336 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 142495: authorized by Matthew Carrano, entered by Matthew Carrano on 12.04.2013

Creative Commons license: CC BY (attribution)