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 Anaspidea Fischer, 1883 - sea hares
         Superfamily Aplysioidea Lamarck, 1809
           Family Notarchidae see Subfamily Notarchinae Mazzarelli, 1893
             1 Subfamily Notarchinae Mazzarelli, 1893 [monotypic]
             2 Subfamily Stylocheilinae Eales, 1984, nom. nud. [monotypic]
             3 Subfamily Bursatellinae Eales, 1984, nom. nud. [monotypic] see Subfamily Aplysiinae Lamarck, 1809