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 †Somphoentactiniinae Kozur & Mostler, 1981
Genus †Spongosphaera Won, 1997, nom. illeg.