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 Oviformata Afanasieva & Amon, 2005 Family Archaeospongoprunidae Pessagno, 1973 Genus Spongoprunum Haeckel, 1887