This shell is trigonal-ovate and inequilateral in shape, with one end strongly pointed. Sculpture consists of concentric ribs or frills intersected by flat radial threads.

Size: 45-60 mm.

Ecology: inhabits shallow marine (5-50 m) waters, burrowing in silt near the sediment surface.

Geological range: Early-Late Miocene (20-9 million years ago).

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