Where: Niobrara County, Wyoming (43.1° N, 104.1° W: paleocoordinates 49.5° N, 78.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Lance Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by J. B. Hatcher & Sullins in 1891; reposited in the USNM

Collection methods: quarrying, mechanical,

Primary reference: O. C. Marsh. 1892. Notice of new reptiles from the Laramie Formation. American Journal of Science 43:449-453 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 52871: authorized by Matthew Carrano, entered by Matthew Carrano on 25.08.2005

Creative Commons license: CC BY (attribution)