Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
     Class Spumellaria Ehrenberg, 1875
       Order Saturnalata Afanasieva & Amon, 2005
         Family Saturnalidaeᵀ Deflandre, 1953
           Subfamily Axopruninae Dumitrica, 1983
             1 Genus Amphisphaerella Haeckel, 1887
             2 Genus Axoprunum Haeckel, 1887
             3 Genus Stylacontarium Popofsky, 1912
             4 Genus Xiphosphaerella Haeckel, 1887
             5 Genus Xiphostyletta Haeckel, 1887