Shells are rounded-trigonal in shape, with one end pointed. Sculpture consists of coarse, thick, concentric ribs, and faint radial streaks.

Size: 30-45 mm.

Ecology: inhabits offshore marine (15-100 m) waters, burrowing in silt near sediment surface.

Geological range: Late Miocene (11-7 million years ago).

Geographic distribution: Caribbean – Panama, Colombia, and Venezuela; Pacific – Panama and Ecuador.