Shells, operculum and radula of Luzonocoptis gen. n. species. A–F Luzonocoptis antenna sp. n. A outer side of the operculum B inner surface of the operculum C SEM of the inner surface of the operculum D schematic drawing of the inner side, showing the slightly elevated ridge and the central nipple E radula (paratype no. 7.) F Neck region G Neck region of Luzonocoptis angulata sp. n. H protoconch of Luzonocoptis antenna sp. n. I protoconch of Luzonocoptis angulata sp. n. White arrow shows the constriction. All images B. Páll-Gergely.