Cyclostrema granulum Dall, 1889 Parviturbo granulum is a species of sea snail, a marine gastropod mollusk in the family Skeneidae.

Dall) The size of the shell attains 1 mm in height and breadth.

The shell is elevated and compact, having ten or twelve fine strong spiral cinguli, under which are finer radiating raised incremental lines.

It is white with a rounded base and a perforate umbilicus, three whorls, a nearly circular aperture, with slightly thickened or expanded margin.

[2] This species occurs in the Caribbean Sea off the Dominican Republic.