Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Prosobranchia Milne-Edwards, 1848 - prosobranchs see Class Gastropoda Cuvier, 1795
       Order Neogastropoda Wenz, 1938 see Suborder Neogastropoda Wenz, 1938
         Suborder Stenoglossa Bouvier, 1887
           Superfamily Muricoidea Rafinesque, 1815
             Family Harpidae Bronn, 1849 - harp snails
               Subfamily Moruminae Hughes & Emerson, 1987 [monotypic]
                 Genus Morum Röding, 1798
                   1 Subgenus Oniscidia Mörch, 1852