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 Murella Pfeiffer, 1877
                   1 Subgenus Ambigua Westerlund, 1902
                   2 Subgenus Marmorana Hartmann, 1844
                   3 Subgenus Tyrrheniberus Hesse & Kobelt, 1904