Mollusca Linnaeus, 1758 - molluscs see Phylum Mollusca Linnaeus, 1758
   Gastropoda Cuvier, 1795 see Class Gastropoda Cuvier, 1795
     Clade Heterobranchia Burmeister, 1837 see Superorder Heterobranchia Burmeister, 1837
       Informal Group Opisthobranchia Milne-Edwards, 1846 see Order Opisthobranchia Milne-Edwards, 1848
         Clade Nudipleura Wägele & Willan, 2000
           Subclade Nudibranchia Cuvier, 1814 see Order Nudibranchia Cuvier, 1814
             Clade Euctenidiacea Tardy, 1970
               Subclade Doridacea Thiele, 1931
                 Superfamily Polyceroidea Alder & Hancock, 1845
                   1 Family Polyceridae Alder & Hancock, 1845
                   2 Family Aegiretidae Fischer, 1883
                   3 Family Gymnodorididae Odhner, 1941
                   4 Family Hexabranchidae Bergh, 1891
                   5 Family Okadaiidae Baba, 1930