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 Tegulinae Kuroda, Habe & Oyama, 1971
                 Genus Tegula Lesson, 1832
                   1 Subgenus Agathistoma Olsson & Harbison, 1953
                   2 Subgenus Chlorostoma Swainson, 1840 see Genus Chlorostoma Swainson, 1840
                   3 Subgenus Promartynia Dall, 1909
                   4 Subgenus Stearnsium Berry, 1958
                   5 Subgenus Omphalius Philippi, 1847