Shell is moderately slender, with a spire that is variably high and gradually tapering, or blunt, and a thickened callus. Shell exterior is smooth, but ribs on interior of aperture are prominent.

Size: 35-50 mm.

Ecology: inhabits shallow-offshore marine (10-100 m) waters, crawling on sediment surface or plowing through sand or silt near the surface; predatory carnivore, consuming molluscs and crustaceans, and known to seize prey with foot and drag it into sediment.

Geological range: Late Miocene (11-9 million years ago).

Geographic distribution: Caribbean – Panama; Pacific – Panama.