Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
     Class Sphaerellaria Haeckel, 1881
       Order Entactiniata Kozur & Mostler, 1982
         Family Hexastylidae Haeckel, 1881
           1 Genus Centacontium Popofsky, 1912
           2 Genus Centrolonche Popofsky, 1912
           3 Genus Hexastylus Haeckel, 1881
           4 Genus Stigmosphaera Haeckel, 1887
           5 Genus Stigmosphaerusa Hollande & Enjumet, 1960
           6 Genus Stigmostylus Hollande & Enjumet, 1960