Etrema scalarinaEtrema scalarina is a species of sea snail, a marine gastropod mollusc in the family Clathurellidae.DescriptionThe shell grows to a length of 9 mm. The shell is whitish, with a narrow chestnut or chocolate sutural band, and another below the middle of the body whorl only.DistributionThis species occurs in the Indian Ocean along Madagascar, Réunion; in the Central Pacific Ocean.