Mactra stultorum

, Spain; nearly all are single valves of bivalve mollusks, mostly of Mactra corallina This species lives in the Black Sea, the Mediterranean coasts, and the west coast of Europe, from Norway to the Iberian Peninsula, and south to Senegal. ==Habitat==

This bivalve lives on sandy (rarely soft) bottoms at depths of between 5 and 30 m, although the shell is very often found on beaches, where it has been cast up by wave action. ==Shell description==

This species has a very thin and delicate shell, which has concentric growth lines and sometimes also has colored radiating bands, hence its common name, the rayed trough shell. The shell interior is white. File:Mactra stultorum var. atlantica 01.jpg|var. atlanticaRight valve File:Mactra stultorum var. atlantica 02.jpg|var. atlanticaLeft valve File:Mactra stultorum var. cinerea 01.jpg|var. cinereaRight valve File:Mactra stultorum var. cinerea 02.jpg|var. cinereaLeft valve File:Mactra stultorum var lignaria 01.jpg|var. lignariaRight valve File:Mactra stultorum var lignaria 02.jpg|var. lignariaLeft valve ==Human use==

This species is sometimes sold in markets as a food item. == References ==