Shell minute, discoidal, thin, transparent, white, widely umbilicate. Whorls 3½, including a minute smooth protoconch of one whorl. Whorls biangulated by a sutural and a basal smooth spiral keel. Spire almost flat, but with a broad straight slightly downward-sloping shoulder; straight and vertical between keels; base lightly convex. Umbilicus one-third diameter of base. Sculpture of numerous inconspicuous radial growth lines only. Aperture subquadrate. Peristome thin, discontinuous.

Height, 0·35 mm.; diameter, 0·8 mm. (holotype).
Holotype in Auckland Museum.
Locality: Tom Bowling Bay, Northern N.Z. (in shell-sand).