By Vermeulen (1994)
"spire conicalwith distinct onvex sides, or almost cylindrical. Apex slightly oblique. Whorls 3 3/8- 3 5/8, convex; the penultimate rounded or slightly angular on the right side if the spire is observed in front view, the ultimate obtusely angular. Constriction with a thick parietalis which continues far into the tuba; with a tansverse palatalis, with a columellaris. Tuba touching the spire over its entire length, gradually narrowed towards the constriction, obtusely to almost sharply angular below. Radial ribs on the spire rather closely placed to moderately spaced (5-8 ribs/0.5 mm on the penultimate whorl), not sinuous; those on the tuba (rather) closely placed (6-10 ribs/0/5 mm half-way the tuba), with a shallow to rather deep, semi-circular loop below. Spiral striation present. Umbilicus open, 0.20-0.25 mm across. Aperture tilted up to 45 degrees with regard to the coiling axis, its upper margin slightly below the level of the apex, subtriangular with rounded edges, with the continuation of the parietalis just visible along its lower side if the sperture is observed in front view, with a distinct tooth along the upper side. Peristome double, outer peristome widely spreading beyond the inner, but gradually narrowed towards, and absent along the right side of the aperture; inner peristome protruding from the outer, little spreading, its outer surface and the upper surface of the outer peristome with closely placed, slightly irregular lamellae. Spire: height 1.1-1.5 mm; width 1.1-1.2 mm; index 1.0-1.3. Total width 1.8-2.0 mm. Height aperture 0.4-0.5 mm; width 0.5-0.6 mm."