Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Opisthobranchia Milne-Edwards, 1848 - opisthobranchs see Order Opisthobranchia Milne-Edwards, 1848
       Order Nudibranchia Cuvier, 1814 - "true" nudibranchs
         Suborder Doridina Odhner, 1934
           1 Superfamily Gnathodoridoidea Schmekel & Portmann, 1982, nom. inval.
           2 Superfamily Anadoridoidea Vaught, 1989, nom. inval.
           3 Superfamily Eudoridoidea Vaught, 1989, nom. inval. see Superfamily Doridoidea Rafinesque, 1815
           4 Superfamily Phyllidioidea Rafinesque, 1814