Classic taxon

Taxonomy considered valid until the deep revision of the group by Bouchet et Rocroi (2005):

Phylum MOLLUSCA (Cuvier, 1795)

Class GASTROPODA (Cuvier, 1795)

• Subclass ORTHOGASTROPODA (Ponder et Lindberg, 1996)
  • Superorder OPISTHOBRANCHIA (Milne-Edwards, 1848)
    • Order CEPHALASPIDEA s.s. (Mikkelsen, 1996)
      • Family AGLAJIDAE (Renier, 1807)
        • Genus Philinopsis (Pease, 1860)
      • Family RUNCINIDAE (H. et A. Adams, 1854)
        • Genus Runcina (Forbes et Hanley, 1853)
      • Family HAMINOEIDAE (Pilsbry, 1895)
        • Genus Haminoea (Turton et Kingston, 1830)
    • Order ANASPIDEA (Fischer, 1883)
      • Family APLYSIIDAE (Lamarck, 1809)
        • Genus Aplysia (Linnaeus, 1767)
        • Genus Petalifera (Gray, 1847)
    • Order SACOGLOSSA (Von Ihering, 1876)
      • Suborder PLAKOBRANCHACEA (Rang, 1829)
        • Superfamily PLAKOBRANCHOIDEA (Rang, 1829)
          • Family PLAKOBRANCHOIDEA (Rang, 1829)
            • Genus Elysia (Risso, 1818)
        • Superfamily LIMAPONTIOIDEA (Gray, 1847)
          • Family HERMAEIDAE (Adams et A. Adams, 1854)
            • Genus Hermaea (Lovén, 1844)
          • Family LIMAPONTIIDAE (Gray, 1847)
            • Genus Placida (Trinchese, 1876)
            • Genus Thuridilla (Bergh, 1872)
          • Family BOSELLIIDAE (Marcus, 1982)
            • Genus Bosellia (Trinchese, 1891)
        • Superfamily LIMAPONTIOIDEA (Gray, 1847)
    • Order UMBRACULACEA (Dall, 1889)
      • Family TYLODINIDAE (Gray, 1847)
        • Genus Tylodina (Rafinesque, 1814)
      • Family UMBRACULIDAE (Dall, 1889)
        • Genus Umbraculum (Schumacher, 1817)
    • Cladus NUDIPLEURA (Wägele et Willan, 2000)
    • Order PLEUROBRANCHACEA (Férussac,1822)
      • Family PLEUROBRANCHIDAE (Férussac,1822)
        • Subfamily PLEUROBRANCHINAE (Férussac, 1822)
          • Tribe BERTHELLINI (Burn, 1962)
            • Genus Berthella (Blainville, 1824)
    • Order NUDIBRANCHIA (Blainville, 1814)
      • Suborder ANTHOBRANCHIA (Minichev, 1970)
        • Infraorder DORIDINA (Pelseneer, 1894)
          • Family ONCHIDORIDIDAE (Alder et Hancock, 1845)
            • Genus Onchidoris (Blainville, 1816)
            • Genus Diaphorodoris (Iredale et O’Donoghue, 1923)
          • Family GONIODORIDIDAE (H. et A. Adams, 1854)
            • Genus Trapania (Provot-Fol, 1931)
          • Family POLYCERIDAE (Alder et Hancock, 1845)
            • Genus Limacia (O.F. Müller, 1781)
            • Genus Polycera (Cuvier, 1817)
            • Genus Crimora (Alder et Hancock, 1862)
          • Family CHROMODORIDIDAE (Bergh, 1891)
            • Genus Hypselodoris (Stimpson, 1855)
            • Genus Chromodoris (Alder et Hancock, 1855)
            • Genus Cadlina (Bergh, 1878)
          • Family DORIDIDAE (Rafinesque, 1815)
            • Genus Doris (Linnaeus, 1758)
            • Genus Platydoris (Bergh, 1877)
            • Genus Peltodoris (Bergh, 1880)
          • Family PHYLLIDIIDAE (Rafinesque, 1814)
            • Genus Phyllidia (Cuvier, 1797)
          • Family DENDRODORIDIDAE (O’Donoghue, 1924)
            • Genus Dendrodoris (Ehrenberg, 1831)
      • Suborder CLADOBRANCHIA (Willan et Morton, 1984)
        • Infraorder DENDRONOTINA (Sars, 1878)
          • Family TRITONIIDAE (Lamarck, 1809)
            • Genus Tritonia (Cuvier, 1803)
            • Genus Marionia (Vayssière, 1877)
          • Family HANCOCKIIDAE (Mac Farland, 1923)
            • Genus Hancockia (Gosse, 1877)
          • Family DOTOIDAE (Gray, 1853)
            • Genus Doto (Oken, 1815)
        • Infraorder ARMININA (Odhner, 1934)
          • Family ARMINIDAE (Iredale et O’donoghue, 1923)
            • Genus Armina (Rafinesque, 1814)
        • Infraorder AEOLIDINA (Odhner, 1934)
          • Family FLABELLINIDAE (Bergh, 1889)
            • Genus Flabellina (Voigt, 1834)
            • Genus Calmella (Eliot, 1906)
          • Family FACELINIDAE (Bergh, 1889)
            • Genus Favorinus (Gray, 1850)
            • Genus Facelina (Alder et Hancock, 1855)
            • Genus Cratena (Bergh, 1864)
            • Genus Caloria (Trinchese, 1888)
            • Genus Facelinopsis (Provot-Fol, 1954)
            • Genus Dondice (Marcus, 1958)
          • Family AEOLIDIIDAE (D’Orbigny, 1834)
            • Genus Spurilla (Bergh, 1864)
            • Genus Aeolidiella (Bergh, 1867)
            • Genus Berghia (Trinchese, 1877)
          • Family EUBRANCHIDAE (Odhner, 1934)
            • Genus Eubranchus (Forbes, 1838)
          • Family TERGIPEDIDAE (Thiele, 1931)
            • Genus Cuthona (Alder et Hancock, 1855)