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 †Palacantholithidae Kozur & Mostler, 1981
           1 Genus †Palacantholithus Deflandre, 1973
           2 Genus †Palaeoumbraculum Amon, Braun & Ivanov, 1995