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
         1 Suborder Orthurethra Pilsbry, 1900
         2 Suborder Mesurethra [monotypic]
         3 (Achatinid Sigmurethra)
         4 Suborder Elasmognatha Mörch, 1864 see [unranked] Elasmognatha Mörch, 1864
         5 (Helicid Sigmurethra)