Where: Pontotoc County, Mississippi (34.2° N, 89.0° W: paleocoordinates 37.8° N, 66.4° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Prairie Bluff Chalk Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)
• bed-level stratigraphic resolution
Environment/lithology: chalk
Size class: macrofossils
Reposited in the FMNH
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 78127: authorized by Wolfgang Kiessling, entered by Uta Merkel on 29.01.2008
Creative Commons license: CC BY (attribution)
Taxonomic list
Echinoidea | |
"Cassidulus hemisphericus n. sp." = Clarkiella hemispherica
"Cassidulus hemisphericus n. sp." = Clarkiella hemispherica Slocum 1909 sea urchin |