Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Mollusca Linnaeus, 1758 - molluscs
     Subphylum Cyrtosoma Runnegar & Pojeta Jr., 1974 see Phylum Mollusca Linnaeus, 1758
       Class Gastropoda Cuvier, 1795 - snails and slugs
         Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
           Order Archaeogastropoda Thiele, 1925 see Order Vetigastropoda Salvini-Plawen, 1980
             1 Suborder Pleurotomariina (Cox & Knight, 1960) see Superfamily Pleurotomarioidea Swainson, 1840
             2 Suborder Trochina (Cox & Knight, 1960) see Superfamily Trochoidea Rafinesque, 1815
             3 Suborder †Macluritina Cox & Knight, 1960 see Superfamily Macluritoidea Carpenter, 1861
             4 Suborder †Onychochilina
             5 Suborder †Euomphalina de Koninck, 1881 see Superfamily Euomphaloidea White, 1877
             6 Suborder Patellina Ihering, 1876 see Superfamily Patelloidea Rafinesque, 1815
             7 Suborder Neritopsina Cox, 1960 see Order Neritopsina Cox & Knight, 1960
             8 Suborder †Murchisoniina Cox & Knight, 1960 see Superfamily Murchisonioidea Koken, 1896