living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Mollusca Linnaeus, 1758 - molluscs
           Class Gastropoda Cuvier, 1795 - snails and slugs
             Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
               Order Archaeogastropoda Thiele, 1925 see Order Vetigastropoda Salvini-Plawen, 1980
                 Superfamily Trochacea see Superfamily Trochoidea Rafinesque, 1815
                   1 Family Trochidae Rafinesque, 1815 - top snails
                   2 Family Seguenziidae Verrill, 1884
                   2 Family Sequenziidae see Family Seguenziidae Verrill, 1884
                   3 Family Stomatellidae J.E. Gray, 1840 see Subfamily Stomatellinae Gray, 1840
                   4 Family Angariidae Thiele, 1924 see Subfamily Angariinae Gray, 1857
                   5 Family Skeneidae Clark, 1851 see Subfamily Skeneinae Clark, 1851
                   6 Family Cyclostrematidae Fischer, 1885 see Subfamily Liotiinae Gray, 1850
                   7 Family Turbinidae Rafinesque, 1815 - turban snails
                   8 Family Phasianellidae Swainson, 1840