Back to Shell Guide

Southwest Florida Shells with Emphasis on Sanibel & Captiva

By José H. Leal

Family Calyptraeidae

Bostrycapulus aculeatus

(Gmelin, 1791)

Spiny Slipper Snail

Shell size to 23 mm, sculptured with rough, small spines arranged along ribs that radiate from apex. Apex turned to one side. Interior with white platelike septum. Color white, light-gray, brownish, or rarely greenish, sometimes with rays of lighter color.