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Atrina harrisii

Geological Range

Late Pliocene to Early Pleistocene; Extinct.

Paleogeographic Distribution

Southern Florida to Virginia.

Remarks

Original Description (from Dall, 1898, p. 663):

"Types collected by G. D. Harris (in honor of whom the species is named) from the Miocene at Jones's Wharf on the Patuxent River, Maryland; other specimens were found by him near Plum Point, Maryland, and a fragment at Magnolia, Duplin County, North Carolina, by Burns.

Shell rather thick (the fibrous layer lost in the specimens), ovately rounded behind, moderately convex; hinge-line straight, ventral margin slightly incurved; the surface of the pearly layer shows the dorsal region with numerous fine longitudinal elevated lines, below which the shell is at first nearly smooth, then the ventral region is sculptured with numerous close-set concentric riblets. Length of portion preserved about 150, max. width 60, diam. 32 mm.

This species appears to have been not unlike A. serrata Sowerby, but was a much heavier shell with a blunter anterior end."

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Stratigraphic Occurrences

Early Pleistocene
Nashua Formation (N. FL)
Waccamaw Formation (SC, NC)
Late Pliocene
Duplin Formation (SC, NC)
Jackson Bluff Formation (N. FL)
Raysor Formation (SC)
Tamiami Formation (Pinecrest Beds) (S. FL)
Yorktown Formation (VA)
<i>Atrina harrisii</i> from the Late Pliocene Tamiami Fm. (Pinecrest Beds) of Sarasota County, Florida (UF 191351).
Atrina harrisii from the Late Pliocene Tamiami Fm. (Pinecrest Beds) of Sarasota County, Florida (UF 191351).
Specimen of <i>Atrina harrisii</i> figured by Dall (1898, pl. 29, fig. 11); 150 mm in length.
Specimen of Atrina harrisii figured by Dall (1898, pl. 29, fig. 11); 150 mm in length.
Early Pleistocene Map
Early Pleistocene Map
Late Pliocene Map
Late Pliocene Map