RugulinaRugulina is a genus of sea snails, marine gastropod molluscs in the family Pendromidae.DistributionThese species has a bipolar distribution. They occur in the cold waters of the Western Atlantic and two species off Antarctica.SpeciesSpecies within the genus Rugulina include:Rugulina antarctica Rugulina fragilis Rugulina ignobilis Rugulina monterosatoi Rugulina tenuis ''Rugulina verrilli''