Portobello Point, Zones 22-23 (Miocene of the United States)

Where: St. Marys County, Maryland (38.2° N, 76.5° W: paleocoordinates 38.3° N, 74.4° W)

• coordinate estimated from map

When: Little Cove Point Member (Saint Marys Formation), Tortonian (11.6 - 7.2 Ma)

Environment/lithology: marine; argillaceous, silty sandstone

Primary reference: L. W. Ward. 1992. Molluscan biostratigraphy of the Miocene Middle Atlantic Coastal Plain of North America. Virginia Museum of Natural History 2 [A. Miller/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 71635: authorized by Mark Uhen, entered by Mark Uhen on 02.05.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Cerithioidea - Turritellidae
"Turritella plebeia" = Mariacolpus plebeia
"Turritella plebeia" = Mariacolpus plebeia Say 1824 turret shell
subspecies plebeia
 Neogastropoda - Nassariidae
Bivalvia
 Cardiida - Veneridae
Mercenaria cuneata Conrad 1869 quahog
Dosinia acetabulum Conrad 1832 venus clam
subspecies thori
 Hiatellida - Hiatellidae
Panopea goldfussii Wagner 1839 clam