Subclass Radiolaria Müller, 1858 see Phylum Actinopoda Calkins, 1902
   Order Polycystina Ehrenberg, 1838 see Class Polycystina Ehrenberg, 1838
     Suborder Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875
       Family Actinommidae Haeckel, 1862
         Genus Hexacontium Haeckel, 1881
           Hexacontium enthacantum Jorgensen, 1899 see Hexacontium enthacanthum Jørgensen, 1900