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 Pyloniata Haeckel, 1881 Superfamily Larnacillioidea Haeckel, 1887 Family Tholoniidae Haeckel, 1887 Genus Tholonium Haeckel, 1887