Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
     Class Sphaerellaria Haeckel, 1881
       Order Sphaerellata Haeckel, 1887
         1 Family Xiphostylidae Haeckel, 1881
         2 Family †Pantanelliidae Pessagno, 1977
         3 Family †Parvivaccidae Pessagno & Yang, 1989