clade Euthyneura clade Nudipleura clade Nudibranchia clade Dexiarchia clade Cladobranchia | familia = Proctonotidae | genus = Janolus | genus_authority = Bergh, 1884 | subdivision_ranks = Species | subdivision = See text | synonyms_ref= | synonyms= Janolus is a genus of small to large sea slugs, or more accurately nudibranchs, marine gastropod mol...