Spire with (distinctly) convex sides. Whorls 4 1/4-4 7/8.
Radial ribs not sinuous, on the spire rather closely placed to moderately spaced (6-9ribs/0.5 mm on the penultimate whorl), on the tuba moderately spaced (4-5 ribs/0.5mm half-way). Spiral striation absent. Spire: height 1.2-1.5 mm; width 0.9-1.2 mm.

Showing the single result

Show sidebar