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
         (Achatinid Sigmurethra)
           Suborder Sigmurethra Pilsbry, 1900 see Group Sigmurethra Pilsbry, 1900
             01 Superfamily Partuloidea Pilsbry, 1900 [monotypic]
             02 Superfamily Orthalicoidea Martens, 1860
             03 Superfamily Achatinoidea Swainson, 1840
             04 Superfamily Aillyoidea Baker, 1955 [monotypic]
             05 Superfamily Oleacinoidea H. Adams & A. Adams, 1855
             06 Superfamily Streptaxoidea Gray, 1860 [monotypic]
             07 Superfamily Strophocheiloidea Pilsbry, 1902 see Superfamily Acavoidea Pilsbry, 1895
             08 Superfamily Acavoidea Pilsbry, 1895
             09 Superfamily Rhytidoidea Pilsbry, 1893
             10 Superfamily Plectopylidoidea Möllendorff, 1898 see Superfamily Plectopyloidea Möllendorff, 1898
             11 Superfamily Punctoidea Morse, 1864