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
         Family Xiphostylidae Haeckel, 1881
           1 Subfamily †Xiphostylinae Haeckel, 1881
           2 Subfamily Stylosphaerinae Haeckel, 1881
           3 Subfamily †Entapiinae Dumitrica, 2001