Where: Niobrara County, Wyoming (43.4° N, 104.4° W: paleocoordinates 49.9° N, 79.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Lance Formation, Maastrichtian (70.6 - 65.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by Sternberg in 1909; reposited in the USNM

Primary reference: B. Brown and E. M. Schlaikjer. 1943. A study of the troödont dinosaurs with the description of a new genus and four new species. Bulletin of the American Museum of Natural History 82(5):115-150 [M. Carrano/M. Carrano/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 64644: authorized by Matt Carrano, entered by Matt Carrano on 11.09.2006