Phylum Mollusca Linnaeus, 1758 - molluscs
   Subphylum Conchifera Gegenbauer, 1878
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Subclass Orthogastropoda Ponder & Lindberg, 1995
         Superorder Heterobranchia Burmeister, 1837
           Order Opisthobranchia Milne-Edwards, 1848
             Suborder Anaspidea P. Fischer, 1883 - sea hares see Order Anaspidea Fischer, 1883
               Superfamily Aplysioidea Lamarck, 1809
                 Family Aplysiidae Lamarck, 1809
                   1 Subfamily Aplysiinae Lamarck, 1809
                   2 Subfamily Dolabellinae Pilsbry, 1895
                   3 Subfamily Dolabriferinae Pilsbry, 1895
                   4 Subfamily Notarchinae Mazzarelli, 1893