 As of 2009, this species had apparently not been reported in the literature as occurring in the Lesser Antilles.In contrast, the species "Semicassis undulata" occurs in the Mediterranean Sea, and parts of the North Atlantic Ocean, including Portugal and the Azores.The egg-shaped shell of this species usually grows to 40–55 mm in length (1 1/2" - 2 1/8") (the maximum recorded shell length is 121 mm (4.76 in)).