Borsonia brasilianaBorsonia brasiliana is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.DescriptionThe size of the shell reaches a length of 10.9-12.2 mm, with a maximum width of 4–5.1 mm. It has a characteristic sinistral coiling of the shell, and its whirl tapers toward its canal.DistributionThis marine species occurs off Northeast Brazil.