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Cyclocardia granulata

Geological Range

Late Pliocene to Middle Pleistocene; Extinct.

Paleogeographic Distribution

Southern Florida to Virginia.

Remarks

Original Description (from Say, 1824, p. 142):

"Suborbicular, with about twenty-five convex ribs, and wrinkled across; inner margin crenate.

Description. Beaks nearly central, a little prominent, curved backward: ribs granulated on the umbones, and transversely wrinkled near the base, convex: apices somewhat prominent beyond the general curve of the shell: inner margin and edge crenate: cardinal teeth two.

Length from the apex to the base four-fifths of an inch, breadth nearly the same.

Rather proportionally longer than the decussata, and more oblique."

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Stratigraphic Occurrences

Middle Pleistocene
Bermont Formation (S. FL)
Early Pleistocene
Bear Bluff Formation (SC)
Chowan River Formation (VA)
Nashua Formation (N. FL)
Waccamaw Formation (SC, NC)
Late Pliocene
Duplin Formation (SC, NC)
Jackson Bluff Formation (N. FL)
Raysor Formation (SC, NC)
Tamiami Formation (Pinecrest Beds) (S. FL)
Yorktown Formation (VA)
Yorktown Formation (Moore House Member) (VA)
<i>Cyclocardia granulata</i> from the Late Pliocene Raysor Formation of Darlington County, Florida (UF 197634).
Cyclocardia granulata from the Late Pliocene Raysor Formation of Darlington County, Florida (UF 197634).
Middle Pleistocene Map
Middle Pleistocene Map
Early Pleistocene Map
Early Pleistocene Map
Late Pliocene Map
Late Pliocene Map