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
       Superfamily Trochacea see Superfamily Trochoidea Rafinesque, 1815
         1 Family Trochidae Rafinesque, 1815 - top snails
         2 Family Angariidae Thiele, 1924 see Subfamily Angariinae Gray, 1857
         3 Family Cyclostrematidae Fischer, 1885 see Subfamily Liotiinae Gray, 1850
         4 Family Liotiidae Gray, 1850