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 Spongodiscata Haeckel, 1862 Family †Relindellidae Kozur & Mostler, 1980 Genus †Tetraspongodiscus Kozur & Mostler, 1979