Cyclostrema quadricarinatum

Cyclostrema quadricarinatum is a species of sea snail, a marine gastropod mollusk in the family Liotiidae.

Description
(Original description by Melvill & Standen) The height of the shell attains 1 mm and its diameter 2.25 mm. The solid, depressed shell is umbilicated. The shell is highly sculptured with a minute angle. It contains 3½ whorls with the upper whorl minute. The body whorl is larger in proportion, four-keeled and with acute carinae. With the aid of a lens the surface is seen to be longitudinally extremely shagreened or striate. The peristome is continuous, six-angled externally. The aperture is round. The operculum is present, horny and multispiral. The nearest ally, Circulus smithi Bush, 1897 (synonym: Cyclostrema trlcarinata Smith ), from West Africa, we have compared with our species. There is some affinity, but, as its name implies, that species is but three-angled and is likewise radiately lirate.

Distribution
This species occurs in the Gulf of Oman.