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 †Staurodruppidae Afanasieva, 2000 Genus †Spongocoela Hinde, 1899