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
               Subfamily Trochinae Rafinesque, 1815
                 Tribe Trochini Rafinesque, 1815
                   Genus Trochus Linnaeus, 1758
                     01 Subgenus Trochus Linnaeus, 1758
                     02 Subgenus Akoya Habe, 1961
                     03 Subgenus Belangeria Fischer, 1880
                     04 Subgenus Coelotrochus Fischer, 1880
                     05 Subgenus Infundibulops Pilsbry, 1889
                     06 Subgenus Infundibulum Montfort, 1810
                     07 Subgenus Kanekotrochus Habe, 1958
                     08 Subgenus Praecia Gray, 1857
                     09 Subgenus Thorista Iredale, 1915
                     10 Subgenus Thoristella Iredale, 1915