Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Mollusca Linnaeus, 1758 - molluscs
           Subphylum Conchifera Gegenbauer, 1878
             Order Diotocardia
               Superfamily Trochoidea Rafinesque, 1815
                 1 Family Trochidae Rafinesque, 1815 - top snails
                 2 Family Stomatellidae J.E. Gray, 1840 see Subfamily Stomatellinae Gray, 1840
                 3 Family Turbinidae Rafinesque, 1815 - turban snails
                 4 Family Skeneidae Clark, 1851 see Subfamily Skeneinae Clark, 1851
                 5 Family Cyclostrematidae Fischer, 1885 see Subfamily Liotiinae Gray, 1850
                 6 Family Phasianellidae Swainson, 1840
                 7 Family Orbitestellidae Iredale, 1917