Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
     Class Spumellaria Ehrenberg, 1875
       Order †Spongiata Afanasieva & Amon, 2003
         Family †Spongopolyentactiniidae Nazarov, 1975
           Subfamily †Plenoentactiniinae Afanasieva, 1999
             1 Genus †Copicyntra Nazarov & Ormiston, 1985
             2 Genus †Plenoentactinia Won, 1997
             3 Genus †Provisocyntra Nazarov & Ormiston, 1987