Koloonella ignorabilisKoloonella ignorabilis is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.DescriptionThe size of the shell varies between 3.5 mm and 5.2 mm.DistributionThis species occurs in the Atlantic Ocean between Mauritania, Guinea and Angola at depths between 0 m and 75 m.