Koehler & Vaney, 1908
Description:
Shell thin, fragile, globose-conical, surmounted by a short pinnacle comprising the three-, or four-whorled protoconch; teleoconch with three rapidly expanding tumid whorls. Surface of the shell without spiral sculpture. Aperture is large and oval.
Size:
Up to 5 x 3 mm.
Colour:
Colourless.
Animal:
Snout short, broad, with eversible proboscis. Cephalic tentacles are broader at the base, behind which an eye is set. Foot with double-edged anterior margin, large anterior pedal gland and deeply grooved sole; lateral fold extends on to the base of shell in active animals.
Habitat:
Ectoparasitic on regular sea urchins, down to 185 m.
Distribution:
Distributed from the Mediterranean to Norway (Distr. P. minor).