Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
Count: [g†g] 5c;15o;48f;453g; †1c;11o;84f;674g;1s [2 Oct 2018]
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
  Count: [g†g] 5c;15o;48f;453g; †1c;11o;84f;674g;1s [2 Oct 2018]
     Class Spumellaria Ehrenberg, 1875
    Count: [g†g] 3o;5f;23g; †3o;10f;113g [30 Aug 2018]
       Order †Prodigiata Afanasieva & Amon, 2005
      Count: [†g] †2f;22g [29 Aug 2018]
         Family †Eptingiidaeᵀ Dumitrica, 1978
        Count: [†g] †12g [29 Aug 2018]
           Genus †Spongostephanidium Dumitrica, 1978
          Count: -