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 Bradybaenidae Pilsbry, 1934 (1898)
               Subfamily Bradybaeninae Pilsbry, 1934 (1898)
                 Genus Cathaica Möllendorff, 1884
                   1 Subgenus Campylocathaica Andreae, 1900
                   2 Subgenus Kaznakoviella Lindholm, 1922
                   3 Subgenus Pliocathaica Andreae, 1900
                   4 Subgenus Xerocathaica Andreae, 1900