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 Helicellidae Ihering, 1909 see Tribe Helicellini Ihering, 1909
               Subfamily Helicellinae Ihering, 1909 see Tribe Helicellini Ihering, 1909
                 Genus Monacha Fitzinger, 1833
                   1 Subgenus Ashfordia Taylor, 1917
                   2 Subgenus Boemica Schileyko, 1978
                   3 Subgenus Cyrnotheba Germain, 1929
                   4 Subgenus Metatheba Hesse, 1914
                   5 Subgenus Paratheba Hesse, 1914
                   6 Subgenus Plathytheba Thiele, 1931, orth. inval. see Subgenus Platytheba Pilsbry, 1895
                   7 Subgenus Szentgalya Pinter, 1977