Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987 Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838 Class Spumellaria Ehrenberg, 1875 Order Saturnalata Afanasieva & Amon, 2005 Family †Oertlispongidae Kozur & Mostler, 1980 Genus †Steigerispongus Kozur & Mostler, 1996