Filter feeder in the circalittoral and the continental shelf.
« Shell hardly half an inch long, and a very little more in breadth, brown or whitish, very slightly angular at the anterior side, with about 26 close-set rounded ribs thickly clothed with obtuse round tubercles, which on the anterior side project into very short spines; beaks central; inside white, with generally a chesnut stripe on the anterior side of the hinge reaching half way down the shell; the margin strongly serrate. » – W. Turton: Conchylia insularum Britannicarum, London 1822, p.186.
80m deep, in coralligene, Gibraltar Strait. 6mm.
Synonym roseum Lamarck (not Gmelin) who writes: « Shell minute, heart-shaped, thin, pink-white in colour; costae large and tight, convex, transversely scratched. » – Hist. Nat. des animaux sans vertèbres vol. VI part.1, Paris 1819, page 14.
