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 †Haplentactiniidae Nazarov, 1980 Subfamily †Haplentactiniinae Nazarov, 1980 Genus †Gracilentactinia Kozur & Mostler, 1989