Claim: Parviturbo fenestratus is a species of a a rare, smallsea snail and the size of the shell varies between 1 mm and 2 mm.
Evidence: Parviturbo fenestratus is a species of a rare, smallsea snail, a marine gastropod mollusk in the family Skeneidae. The size of the shell varies between 1 mm and 2 mm.