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 †Entactiniidae Riedel, 1967
           Subfamily †Thecentactiniinae Afanasieva, 1999
             1 Genus †Belowea Won, 1983
             2 Genus †Cyclocarpus Li & Wang, 1991, nom. dub.
             3 Genus †Duplexia Won, 1983
             4 Genus †Thecentactinia Nazarov, 1975