Morphology:
By Panha (1997)
"Spire conical with convex side; apex not oblique; whorls 6 1/2, last whorl rounded to slightly angular; constriction with a transverse palatalis; tuba gradually narrowed towards the constriction, rounded or slightly angular below the slightly curved projection; radial ribs widely spaced (2 or 3 ribs per 0.5 mm on the penutimate whorl), but a little more closely placed on the tuba; umbilicus open; 0.5 mm across; aperture tilted 45º with regard to the coiling axis, its upper margin at most about level with the penultimate whorl, and circular. Dimensions: spire height 3.1 mm; width 1.6 mm; total width 3.7 mm; height and width of aperture 1.1 mm."
Taxonomic name: