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
             Superfamily Streptaxoidea Gray, 1860 [monotypic]
               Family Streptaxidae Gray, 1860
                 Subfamily Enneinae Bourguignat, 1883
                   Genus Streptostele Dohrn, 1866
                     1 Subgenus Graptostele Pilsbry, 1919
                     2 Subgenus Raffraya Bourguignat, 1883
                     3 Subgenus Textostele Venmans, 1959
                     4 Subgenus Tomostele Ancey, 1885