Cyclostrema carinatum is a species of sea snail, a marine gastropod mollusk in the family Liotiidae.
The diameter of the shell is 2.5 mm. The solid shell is widely umbilicated, with regular, angular spiral carinae. The interstices are radiately sculptured. The 4 whorls are convex and rapidly increasing. The last whorl is dilated in front. The aperture is subcirciilar. The peristome is thickened and subcontinuous.
