Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
     Class Stauraxonaria Afanasieva & Amon, 2005
       Order †Pyramidata Afanasieva & Amon, 2005
         Family †Cavaspongiidae Pessagno, 1973
           1 Genus †Cavidiscus Pessagno, 1976
           2 Genus †Cavaspongia Pessagno, 1973
           3 Genus †Dumitricaia Pessagno, 1976