Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
     Class Spumellaria Ehrenberg, 1875
       Order Capsulata Afanasieva & Amon, 2005
         1 Family Centrocubidaeᵀ Hollande & Enjumet, 1960
         2 Family Quinquecapsulariidae Dumitrica, 1995
         3 Family Rhizosphaeridae Haeckel, 1881