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 Stauraxonaria Afanasieva & Amon, 2005
    Count: [g†g] 5o;11f;59g; †3o;25f;129g [6 Sep 2018]
       Order †Palaeodiscata Afanasieva & Amon, 2005 [monotypic]
      Count: [†g] †1f;6g [30 Aug 2018]
         Family †Palaeodiscidaeᵀ Afanasieva, 2000
        Count: [†g] †6g [30 Aug 2018]
           Genus †Sphaerodiscus Won, 1983
          Count: -