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 Cepaea Held, 1837
                   Subgenus Octadena Vaught, 1989, orth. inval. see Subgenus Octadenia Schileyko, 1978