Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987 Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838 Class Spumellaria Ehrenberg, 1875 Order Cancelliata Afanasieva & Amon, 2003 Family †Polyentactiniidae Nazarov, 1975 1 Subfamily †Polyentactiniinae Nazarov, 1975 2 Subfamily †Magnisphaerinae Afanasieva, 1999 [monotypic]