Where: New Castle County, Delaware (39.5° N, 75.7° W: paleocoordinates 39.0° N, 45.6° W)
• coordinate estimated from map
• local area-level geographic resolution
When: Marshalltown Formation, Late/Upper Campanian (83.5 - 70.6 Ma)
• Upper Cretaceous, probably Campanian, most likely from Marshalltown Formation
• group of beds-level stratigraphic resolution
Environment/lithology: marine; sandstone
Size class: macrofossils
Collected in 1830; reposited in the ANSP
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 78138: authorized by Wolfgang Kiessling, entered by Uta Merkel on 29.01.2008
Creative Commons license: CC BY (attribution)
Taxonomic list
| Echinoidea | |
"Clypeaster florealis n. sp." = Hardouinia florealis, "Clypeaster geometricus n. sp." = Pygurostoma geometricum
"Clypeaster florealis n. sp." = Hardouinia florealis Morton 1833 sea urchin
"Clypeaster geometricus n. sp." = Pygurostoma geometricum Morton 1833 sea urchin | |