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 Tectus Montfort, 1810
                     1 Subgenus Cardinalia Gray, 1842
                     2 Subgenus Rochia Gray, 1857
                     3 Subgenus Tectus Montfort, 1810