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 Neritacea see Superfamily Neritoidea Rafinesque, 1815
                   Family Helicinidae Férussac, 1822 - helicinids
                     1 Subfamily Helicininae Férussac, 1822
                     2 Subfamily Hendersoniinae Baker, 1926
                     3 Subfamily Proserpininae see Family Proserpinidae Gray, 1847
                     4 Subfamily Vianinae Baker, 1922
                     5 Subfamily Ceratodiscinae Pilsbry, 1927
                     6 Subfamily Proserpinellinae Baker, 1923 see Family Proserpinellidae Baker, 1923