Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
     Class Nassellaria Ehrenberg, 1847
       Order Cyrtidinata Haeckel, 1862
         Superfamily Eucyrtidioidea Ehrenberg, 1847
           Family †Obeliscoitidae O'Dogherty, 1994
             1 Genus †Birkenmajeria Widz & De Wever, 1993
             2 Genus †Obeliscoites O'Dogherty, 1994
             3 Genus †Olanda Hull, 1997