Phylum [Mollusca] Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Archaegastropoda see Order Archaeogastropoda Thiele, 1925
         Superfamily Trochacea see Superfamily Trochoidea Rafinesque, 1815
           1 Family Cyclostrematidae Fischer, 1885 see Subfamily Liotiinae Gray, 1850
           2 Family Trochidae Rafinesque, 1815 - top snails
           3 Family Phasianellidae Swainson, 1840
           4 Family Angariidae Thiele, 1924 see Subfamily Angariinae Gray, 1857
           5 Family Turbinidae Rafinesque, 1815 - turban snails