Length 78 mm, height 157 mm, breadth 13 mm. Shell thin, fragile, triangular. Umbo tapering and ending in a sharp point. Dorsal margin straight meeting in right angle with straight posterior margin. Ventral margin gently swollen. Surface iron colored, with some 60 serrated radial ribs. Interior similar to the surface in color. Muscle scar brown.
Distribution:
North Carolina to Florida, Texas, West Indies and Suriname. Sublittoral.
Remarks:
This species has the finest scales among the sympatric species in this region.