Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Divasibranchia Minichev & Starobogatov, 1975
       Order Stylommatophora Schmidt, 1855 see Infraorder Stylommatophora Schmidt, 1855
         (Helicid Sigmurethra)
           Superfamily Helixarionoidea Bourguignat, 1883, orth. inval.
             Family Ariophantidae Godwin-Austen, 1888
               Subfamily Dyakiinae Gude & Woodward, 1921 see Family Dyakiidae Gude & Woodward, 1921
                 01 Genus Dyakia Godwin-Austen, 1891
                 02 Genus Asperitas Gude, 1911
                 03 Genus Elaphroconcha Gude, 1911
                 04 Genus Everettia Godwin-Austen, 1891
                 05 Genus Kalamantania Laidlaw, 1931
                 06 Genus Pseudoplecta Laidlaw, 1932
                 07 Genus Quantula Baker, 1941
                 08 Genus Rhinocochlis Thiele, 1931
                 09 Genus Sasakina Rensch, 1930
                 10 Genus Staffordia Godwin-Austen, 1907