Arcinella cornuta

Phylum: Mollusca
Class: Bivalvia
Order: Imparidentia
Family: Chamidae
Genus: Arcinella
Species: Arcinella cornuta (Conrad, 1866)
Common Name: Spiny jewel box clam

Information
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Maps

Geological Range

Late Pliocene to Late Pleistocene; Recent.

Paleogeographic Distribution

Southern Florida to North Carolina.

Remarks

For information on the modern distribution of the species, see Malacolog and WoRMS.

Original Description (from Conrad, 1866, p. 105):

"Description. — Orbicular-cordate; radiating ribs very spinous; spines very thick, tubular; interstices deep, rugoso-punctate; lunale broadly cordate; buccal side granulated.

Chama arcinella, Tuomey and Holmes (not Lamarck). Pliocene Fossils of South Carolina, p. 22, pi. vii.; fig. 4, 5, 6.

Observations. — This species differs from the recent one in being larger, much thicker, and more especially in having fewer spines, which are much thicker than in the recent species, and not in two series of thick and thin spines, which characterize the latter."

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Stratigraphic Occurrences

Late Pleistocene: Coffee Mill Hammock Formation (S. FL); Fort Thompson Formation (N. FL); Fort Thompson Formation? (N. FL)
Middle Pleistocene: Bermont Formation (S. FL); Bermont Formation? (S. FL)
Early Pleistocene: Caloosahatchee Formation (S. FL); Caloosahatchee Formation (N. FL); Caloosahatchee Formation (Bee Branch Member) (S. FL); Nashua Formation (N. FL); Waccamaw Formation (SC, NC)
Late Pliocene: Duplin Formation (NC); Duplin / Raysor formations (GA); Jackson Bluff Formation (N. FL); Raysor Formation (GA, SC); Tamiami Formation (S. FL); Tamiami Formation (Lower) (S. FL); Tamiami Formation (Pinecrest Beds) (S. FL)