Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Heterobranchia Burmeister, 1837 [monotypic] see Superorder Heterobranchia Burmeister, 1837
       Order Heterostropha Fischer, 1885
         Superfamily Rissoelloidea Gray, 1850
           Family Cimidae Warén, 1993
             Genus Graphis Jeffreys, 1867
               Subgenus Coenaculum Iredale, 1924 see Genus Coenaculum Iredale, 1924