clade Hypsogastropoda informal group Ptenoglossa | superfamilia = Epitonioidea | familia = Janthinidae | genus = Janthina | genus_authority = Röding, 1798 | subdivision_ranks = Species | subdivision = See text | synonyms_ref = | synonyms = Janthina is a genus of small to medium-sized pelagic or planktonic sea snails, marine gastropod molluscs in ... Found on http://en.wikipedia.org/wiki/Janthina