By Vermeulen (1991)
"Shell white, slightly translucent. Whorl 3 1/8- 3 5/8 (tuba not included); top whorls moderately oblique, moderately elevated; body whorls forming an usually moderately obliquely cylindrical body, convex, well rounded, with the suture well impressed. constriction rather distinct, gradual. Tuba consisting of approximately 1/2 whorl (rarely somewhat less), touching the body whorls over its entire length, approximately circular in section. Shell with narrow, sometimes ratehr inconspicuous radial ribs, which are moderately to sidely spaced near the top, rather densely placed to moderately spaced and rather low on the upper body whorl (30-46 ribs present on this whorl), approximately similar but more widely spaced on the lower body whorl, widely spaced over the area of the constriction, and moderately spaced and more prominent on the tuba. Ribs crossed by fine spiral striation. umbilicus open, deep, narrow. Aperture with the imaginary plane through the inner peristome tilted up to 30 degrees with regard to the coiling axis of the body whorls; with the upper margin not protruding beyond the plane perpendicular to the coiling axis of the body whorls as well as through the apex; widely ovate to circular; apertural teeth absent; inner peristome moderately thinkened, moderately reflected; outer peristome moderately flaring on the palatal side. Constriction inside with three teeth: one longitudinal, short, lamella-like palatalis which does not or hardly project into the tuba: one distinct, oblique, short, rather high infracolumellaris; one often inconspicuous, transverse, rather long, palatalis (almost missing in soem specimens). Measurements.-Height of body whorls 0.8-1.0 mm; width including tuba 1.3-1.5 mm, without tuba 0.8-1.0 mm; height of aperture 0.5 mm; width of aperture 0.5-0.6 mm."