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 Cephalaspidea Fischer, 1883
         Superfamily Runcinoidea Adams & Adams, 1854
           Family Ildicidae Burn, 1963 see Family Runcinidae Adams & Adams, 1854
             1 Genus Ildica Bergh, 1889
             2 Genus Lapinura Marcus & Marcus, 1970