— (1) Length 1.3-1.6 mm in Europe, up to 1.8 mm in the Canary Islands.
— (2) Fresh shells are vitreous and colourless; bleached ones are whitish.
— (3) The shells are devoid of ornamental sculpture.
— (4) The shells are rather fragile
and there is no labial rib. The outer lip of the aperture is somewhat expanded with something like a sinus at its upper end.
— (5) Large specimens have about 4.2 whorls.
— (6) There is no umbilical chink.
— (7) The dimensions of the apex are about d = 0.09-0.12 mm and D = 0.17-0.20 mm.
— (8) Seen from aside in position 1, the nucleus is little prominent, circumscribed by a rather deep suture. Seen from aside, the nucleus and first 1/4 whorl form a slightly flattened, rather prominent segment of a sphere, circumscribed by a rather deep suture.
— (9) At a magnification of 40 x , no ornamental sculpture can be seen on the protoconch.

Entire Mediterranean; Atlantic coasts of Spain and Portugal; Canary Islands.