Phylum Mollusca Linnaeus, 1758 - molluscs
   Subphylum Conchifera Gegenbauer, 1878
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Subclass Orthogastropoda Ponder & Lindberg, 1995
         Superorder Vetigastropoda Salvini-Plawen, 1980 see Order Vetigastropoda Salvini-Plawen, 1980
           Superfamily Trochoidea Rafinesque, 1815
             Family Trochidae Rafinesque, 1815 - top snails
               01 Subfamily Calliostomatinae Thiele, 1924 (1847)
               02 Subfamily Eucyclinae Koken, 1897 see Family Eucyclidae Koken, 1896
               03 Subfamily Halistylinae Keen, 1958
               04 Subfamily Lirulariinae Hickman & McLean, 1990
               05 Subfamily Margaritinae Thiele, 1924, nom. cons. prop.
               06 Subfamily Solariellinae Powell, 1951 see Family Solariellidae Powell, 1951
               07 Subfamily Stomatellinae Gray, 1840
               08 Subfamily Tegulinae Kuroda, Habe & Oyama, 1971
               09 Subfamily Thysanodontinae Marshall, 1988
               10 Subfamily Trochinae Rafinesque, 1815
               11 Subfamily Umboniinae Adams & Adams, 1854 (1840)