Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Superorder Archaeogastropoda Thiele, 1925
         Order Vetigastropoda Salvini-Plawen, 1980 - archaeogastropods s.l.
           Superfamily Trochoidea Rafinesque, 1815
             Family Skeneidae Clark, 1851 see Subfamily Skeneinae Clark, 1851
               Subfamily Planitrochinae Knight, 1956 see Family Planitrochidae Knight, 1956
                 Genus Chrysotoma Millard, 1996, orth. inval. see Genus Chrysostoma Swainson, 1840