Where: Delta County, Colorado (38.9° N, 107.9° W: paleocoordinates 46.0° N, 78.2° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Scaphites hippocrepis zone, Mancos Shale Formation, Middle Campanian (83.5 - 70.6 Ma)

• Lower middle Campanian

• bed-level stratigraphic resolution

Environment/lithology: offshore; gray, argillaceous, calcareous siltstone

Size class: macrofossils

Preservation: cast, concretion

Collected by J. A. Jensen in 1979

• all material was found in association with a mosasaur skeleton

Primary reference: M. S. Kass. 1999. Prognathodon stadtmani: (Mosasauridae) a new species from the Mancos Shale (Lower Campanian) of western Colorado. Utah Geological Survey Miscellaneous Publication 99-1:275-294 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 5607: authorized by John Alroy, entered by John Alroy on 31.10.1999

Creative Commons license: CC BY (attribution)