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 Plagiacanthidae Hertwig, 1879
           Subfamily †Palaeospiculinae Won, 1999
             1 Genus †Archinella Kozur & Mostler, 1981
             2 Genus †Nazarovites Afanasieva, 2000
             3 Genus †Palaeospiculum Won, 1999
             4 Genus †Palaeothalomnus Deflandre, 1973
             5 Genus †Ramuspiculum Wom & Iams, 2002