Despite the globose shape of the drawing above, there are significant differences with Dall’s Cyclostrema granulum from the caribbean area.
 
« Shell extremely small, semiglobose; spire a little prominent; whorls 3, transversely girdled; girdles rounded, protruding; aperture rounded; umbilicus funnel-shaped, narrow; peristome continuous, distinct, sinuous under the influence of the girdles. » – G. A. Brugnone: Miscellanea malachologica. Pars prima, Palermo 1873, p.13 and fig.25 of the plate.

« Girdles in the last whorl 7-8, wider than their interspaces; the two last ones, encircling the umbilicus, flattened. No traces of transverse striations. Colour white. » – Ibid. Protoconch of about 1 whorl, smooth on the bulbous part, and radially striated after. Transition with the teleoconch marked by a conspicuous radial costa. Presence of a very thin radial microsculpture between the spiral ribs of the teleoconch. Possible growth marks on some specimens.