Shell is ovate and equilateral. Sculpture consists of approximately 30 coarse, radial, inverted-V shaped ribs separated by narrow grooves.
Size: 20-30 mm.
Ecology: inhabits shallow marine waters (5-50 m), burrowing in sand near the sediment surface.
Geological range: Late Miocene (11-9 million years ago).
Geographic distribution: Caribbean – Panama (endemic).