By Vermeulen (1994)
"Spire conical with flat sides. Apex not oblique. Whorls 5 3/4 - 6 5/8, convex; last whorl rounded. Constriction with a transverse palatalis. Tuba free from the spire, laterally sometimes slightly to distinctly bulging and then abruptly narrowed towards the constriction, rounded below. Radial ribs on the spire closely placed to widely spaced (3-9 ribs/0.5 mm on the penultimate whorl) slightly sinuous or not, but those close to the tuba not sinuous; those on the tuba rather closely placed to widely spaced (2-7 ribs/0.5 mm half-way), not sinuous. spiral striation absent. umbilicus open, 0.30-0.40 mm across. Aperture tilted up to 30 degree with regard to the coiling axis, its upper margin widely below the level of the apex, circular to slightly angular. Peristome double, slightly to moderately spreading beyond the inner, but gradually narrowed towards, and absent along the right side of the aperture, usually widened or with a small wing along the upper side, sometimes slightly widened along the lower side; inner peristome somewhat protruding from the outer, (moderately) spreading. Spire: height 1.9-2.5 mm; width 1.3-1.6 mm; index 1.3-1.7. Total width 2.5-3.2. Height and width aperture 0.7-0.8 mm."