Where: Prince George's County, Maryland (38.9° N, 76.9° W: paleocoordinates 39.7° N, 52.8° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Monmouth Group, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Collection methods: Repository: Maryland Geological Survey

Primary reference: C. W. Cooke. 1953. American Upper Cretaceous Echinoidea. United States Geological Survey Professional Paper 254-A:1-44 [W. Kiessling/U. Merkel/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 78173: authorized by Wolfgang Kiessling, entered by Uta Merkel on 30.01.2008, edited by Mark Uhen

Creative Commons license: CC BY (attribution)