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 Conoidea Fleming, 1822
             Family Conidae Fleming, 1822 - cone snails
               Subfamily Clathurellinae Adams & Adams, 1858
                 'clathurellid' group of genera
                   ?Genus Etrema Hedley, 1918
                     1 Subgenus Etremopa Oyama, 1953
                     2 Subgenus Etremopsis Powell, 1942