Ectoparasit in the infralittoral and the upper circalittoral.
Original taxon: Rissoa anceps.
Synonyms: decorata, marioni, scandens…
This is the most slender species of the genus in Mediterranean.
40m deep, off Le Scole, south of the harbour, Isola del Giglio, Toscana, W. Italy. 1,8mm.
