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.
           Suborder Neritopsina Cox, 1960 see Order Neritopsina Cox & Knight, 1960
             Superfamily Helicinoidea Férussac, 1822
               Family Helicinidae Férussac, 1822 - helicinids
                 Subfamily Vianinae Baker, 1922
                   1 Genus Viana Adams & Adams, 1856
                   2 Genus Calidviana Baker, 1954
                   3 Genus Calybium Morlet, 1891
                   4 Genus Eutrochatella Fischer, 1885
                   5 Genus Geophorus Fischer, 1885
                   6 Genus Heudeia Crosse, 1885
                   7 Genus Lucidella Swainson, 1840
                   8 Genus Pseudotrochatella Nevill, 1881
                   9 Genus Pyrgodomus Fischer & Crosse, 1893