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 Helicoidea Rafinesque, 1815
             Family Helicidae Rafinesque, 1815
               Subfamily Helicinae Rafinesque, 1815
                 Genus Allognathus Pilsbry, 1888
                   1 Subgenus Iberellus Hesse, 1908