Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Superorder Archaeogastropoda Thiele, 1925
         Order Vetigastropoda Salvini-Plawen, 1980 - archaeogastropods s.l.
           Superfamily Trochoidea Rafinesque, 1815
             Family Trochidae Rafinesque, 1815 - top snails
               01 Genus Agagus Jousseaume, 1894
               02 Genus Antimargarita Powell, 1951
               03 Genus Anxietas Iredale, 1917
               04 Subgenus Antillachelus Woodring, 1928
               05 Subgenus Nevillia Adams, 1868
               06 Subgenus Vaceuchelus Iredale, 1929
               07 Subgenus Adamsenida Habe, 1952
               08 Subgenus Turcicula Dall, 1881 see Genus Turcicula Dall, 1881
               10 Genus Tibatrochus Nomura, 1940, nom. nud.
               11 Genus Tropidmarga Millard, 1996, orth. inval. see Genus Tropidomarga Powell, 1951
               12 Subgenus Perrinia Adams & Adams, 1854
               13 Genus Costomargarites McLean, 1995
               14 Subfamily Tegulinae Kuroda, Habe & Oyama, 1971
               15 Subfamily Eucyclinae Koken, 1897 see Family Eucyclidae Koken, 1896
               16 Subfamily Margaritinae Thiele, 1924, nom. cons. prop.
               17 Subfamily Trochinae Rafinesque, 1815
               18 Subfamily Stomatellinae Gray, 1840
               19 Subfamily Calliostomatinae Thiele, 1924 (1847)
               20 Subfamily Solariellinae Powell, 1951 see Family Solariellidae Powell, 1951
               21 Subfamily Halistylinae Keen, 1958
               22 Subfamily Lirulariinae Hickman & McLean, 1990 [monotypic]
               23 Subfamily Umboniinae Adams & Adams, 1854 (1840)
               24 Subfamily Cataeginae McLean & Quinn, 1987
               25 Subfamily Trochaclidinae Thiele, 1928 see Family Trochaclididae Thiele, 1928
               26 Subfamily Thysanodontinae Marshall, 1988