Clathromangelia granumClathromangelia granum is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.DescriptionThe shell grows to a length of 7 mm. The shell is conspicuously latticed with coarse sculpture. The aperture is large and truncate at the yellowish white base. They reproduce sexually.DistributionThis species occurs in European waters and in the Mediterranean Sea off Italy and Morocco.