Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
     Class Nassellaria Ehrenberg, 1847
       Order Spyridinata Ehrenberg, 1847
         Family Stephaniidae Haeckel, 1887
           1 Genus Cortina Haeckel, 1887
           2 Genus Plagiocarpa Haeckel, 1881
           3 Genus Stephanium Haeckel, 1887
           4 Genus Zygocircus Bütschli, 1881