Also known as Agathaumas type

Where: Sweetwater County, Wyoming (41.6° N, 108.7° W: paleocoordinates 48.9° N, 84.6° W)

• coordinate stated in text

• small collection-level geographic resolution

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

• "just above a thinner or lower stratum of the Bitter Creek series of coals and overlain by two other coal seams"

• bed-level stratigraphic resolution

Environment/lithology: estuary or bay; lithified, tabular, gray, argillaceous sandstone and coal

Size class: macrofossils

Collected by F. B. Meek & H. M. Bannister, E. D. Cope in 1872; reposited in the AMNH

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

• some plants found in same bed, as well as above, but not described

Primary reference: E. D. Cope. 1872. On the existence of Dinosauria in the transition beds of Wyoming. Proceedings of the American Philosophical Society (separate) 1-2 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 46117: authorized by Matthew Carrano, entered by Matthew Carrano on 03.01.2005

Creative Commons license: CC BY (attribution)