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
             1 Genus †Archeoentactinia Won, 1999
             2 Genus †Gracilentactinia Kozur & Mostler, 1989
             3 Genus †Haplentactinia Foreman, 1963
             4 Genus †Haplopolus Li, 1994
             5 Genus †Magnentactinia Won, 1997
             6 Genus †Protobiramus Won, 1999
             7 Genus †Rotasphaera Noble, 1994
             8 Genus †Secuicollacta Nazarov & Ormiston, 1984
             9 Genus †Wonella Afanasieva, 2000, nom. illeg. see Genus Munzuwonella Afanasieva, 2009