Late Pliocene to Late Pleistocene; Recent.
Southern Florida to northern Florida.
For information on the modern distribution of the species, see Malacolog.
Original Description (from Conrad, 1846, p. 24):
"Inequilateral, triangular; ventricose anteriorly; flexuous and compressed posteriorly; posterior side cuneiform; surface with obtuse concentric ribs, profound on the umbo, and with minute radiating raised lines; color yellowish, varied with fulvous or brown, sometimes in spots, in other specimens with rays; within purple and white, with a whitish margin.
Locality. Tampa Bay."
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