Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
     Class †Aculearia Afanasieva, 1999
       Order Fasciculata Afanasieva & Amon, 2003
         Family †Xiphocladiellidae Nazarov, 1984
           1 Genus †Bissylentactinia Nazarov, 1975
           2 Genus †Campanulithus Nazarov & Rudenko, 1981
           3 Genus †Grosmorneus Wom & Iams, 2002
           4 Genus †Palhindeolithus Deflandre, 1973
           5 Genus †Xiphocabrium Deflandre, 1973
           6 Genus †Xiphocladiella Deflandre, 1973
           7 Genus †Xiphochistrella Nazarov & Rudenko, 1981 see Genus Xiphachistrella Deflandre, 1973