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 Volutidae Rafinesque, 1815 - volutes
               Subfamily Volutilithinae Pilsbry & Olsson, 1954 see Subfamily Athletinae Pilsbry & Olsson, 1954
                 1 Genus Eosephaea King, 1933, orth. inval. see Genus Eopsephaea Fischer, 1883
                 2 Genus Plejona Röding, 1798