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 Helixarionidae Bourguignat, 1883, orth. inval. see Family Helicarionidae Bourguignat, 1877
               Subfamily Sesarinae Thiele, 1931 see Subfamily Helicarioninae Bourguignat, 1877
                 Genus Orpiella Gray, 1855
                   1 Subgenus Eufretum Baker, 1941
                   2 Subgenus Fijia Gude, 1913
                   3 Subgenus Kalendyma Gude, 1911
                   4 Subgenus Halozonites Pilsbry & Cooke, 1941
                   5 Subgenus Irenella Gude, 1913
                   6 Subgenus Owaraha Baker, 1941