Spirotropis monterosatoiSpirotropis monterosatoi is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.TaxonomyBouchet & Warén placed S. sarsi Warén, 1975 and S. carinata of Mediterranean authors in the synonymy of this species, but this was shown to be incorrect by Janssen.DescriptionThe size of an adult shell varies between 14 mm and 26 mm.DistributionThis species occurs in the benthic zone between Iceland and Norway, down to Northwest Africa; in the Mediterranean Sea.