Abra aequalis
- Phylum: Mollusca
- Class: Bivalvia
- Order: Imparidentia
- Family: Semelidae
- Genus: Abra
- Species: Abra aequalis (Say, 1822)
- Common Name: Atlantic abra
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.
First Available Description (from Conrad, 1867, p. 14-15):
"Description. — Subtriangular; very inequilateral; anterior side somewhat produced, acutely rounded at the extremity.
Amphidesma aequalis, Say, Tuomey and Holmes. — Pliocene Foss. of S. Carolina, p. 93, pi. 23, fig. 3.
Observations. — This Miocene fossil has hitherto been considered identical with Say's aequalis, but it differs in attaining a larger size, and more especially in having a much wider cartilage fosset and more elongated or produced anterior side."
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Stratigraphic Occurrences
- Late Pleistocene
- Flanner Beach Formation (NC)
- Fort Thompson Formation? (N. FL)
- Neuse Formation (NC)
- Pamlico Formation (N. FL)
- Satilla Formation (N. FL)
- Satilla Formation? (GA)
- Middle Pleistocene
- Bermont Formation (S. FL)
- Bermont Formation? (S. FL)
- Canepatch Formation (SC)
- Early Pleistocene
- Bear Bluff Formation (SC)
- Caloosahatchee Formation (S. FL)
- James City Formation (NC)
- Nashua Formation (N. FL)
- Waccamaw Formation (SC, NC)
- Late Pliocene
- Croatan Formation (Lower) (NC)
- Duplin Formation (NC)
- Jackson Bluff Formation (N. FL)
- Tamiami Formation (Pinecrest Beds) (S. FL)
