Lottia digitalis (Rathke 1833)
Ribbed Limpet (English)
The sides of the shell are not parallel, the aperture is oval, and the intermediate area is white.
The shell is coloured white to brown with tessellate markings, and has coarse radial ribs that are rounded, and are usually not lighter than the interspaces. The ribs are stongest on the posterior slope, and are somewhat absent at the anterior end. The apex is located in the anterior quarter of the shell, and may overhang the edge of the shell. The anterior slope is concave.
The shell can be up to 25mm.
Found in the high intertidal and splash zone amid acorn barnacles.
Status in BC
Native (Lamb & Hanby)
Northern Alaska to northern Mexico.