Cyclostrema exiguumCyclostrema exiguum is a species of sea snail, a marine gastropod mollusk in the family Liotiidae.DescriptionThe diameter of the shell is 2.3 mm. The shell is rather widely umbilicated. It has a subdiscoidal shape with radiating riblets fimbriating four spiral carinae.DistributionThis species occurs in the Indian Ocean off Madagascar, Réunion and in the Gulf of Aden.