Grazer and detritus feeder.
Original taxon: Rissoa lactea.
Washed ashore, Brindisi, Puglia, S. Italy. 4mm.
Port-Vendres, Eastern Pyrenees, S. France. 3,6-4,6mm.
« Shell white, slightly bluish, covered by a very fine sculpture made of small longitudinal costae crossed by transversal striae; on thze top of each whorl of the spine, the suture seems overlapped by a minute projecting angle; there resides this little sinus open in the superior part of the aperture, which is ovoid; lateral margin sharp; columella callous. » – A. L. G. Michaud: Description de plusieurs nouvelles espèces de coquilles du genre Rissoa, Strasbourg 1832, pages 9-10.
3-6m deep, in offshore gardens made up of small Posidonia patches in rough sand pockets on granitic substract, SW. end of Ghjunchitu Bay, Isola Rossa, NW. Corsica. 4mm.
Original pictures provided by S. Clanzig (FR).
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