By Vermeulen (1994)
"Spire conical with flat to convex sides, rarely with very slightly convex sides. Apex slightly oblique or not. Whorls 4 5/8 - 6 7/8, convex; last whorl rounded or slightly angular. Constriction with a sharply outlined, regularly shaped parietalis, a similar longitudinal palatalis, a transverse palatalis, a columellaris gradually thinning out towards the basal side of the constriction. tuba gradually narrowed towards the constriction, rounded below. Radial ribs (moderately) spaced (3-5 ribs/0.5 mm on the penultimate whorl, 3-4 ribs/0.5 mm half-way on the tuba), (slightly) sinuous (rarely not so); those on the tuba not sinuous. Spiral striation fine. umbilicus open, 0.20-0.35 mm across. Aperture tilted up to 30º with regard to the coiling axis, circular to subrectangular. Peristome distant from the spire, double; outer peristome hardly to moderately spreading beyond the inner, but gradually narrowed towards, and absent narrow along the side of the aperture, often slightly widened along the upper side; inner peristome slightly protruding (rarely somewaht more protruding) from the outer, spreading. Spire: height 1.5-2.3 mm; width 0.9-1.5 mm; index 1.3-1.7. Total width 1.7-3.0 mm. Height and width aperture 0.4-0.6 mm."