Elliptio sp.

1, 2. Pocataligo River, Sumter Co., SC. 1. - 71 mm; 2. - 56 mm.

Range: Pocataligo River system.

Remarks: So far known only from the Pocataligo River system, this unusual species does not closely resemble any others. The unique coloration, elongate shape, inflated shells, and sharp dorsal ridge set it apart from its congeners.