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
           1 Subfamily †Spongopolyentactiniinae Nazarov, 1975
           2 Subfamily †Somphoentactiniinae Kozur & Mostler, 1981
           3 Subfamily †Plenoentactiniinae Afanasieva, 1999