Cyclostrema exiguum

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

Description
The 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.

Distribution
This species occurs in the Indian Ocean off Madagascar, Réunion and in the Gulf of Aden.