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 Eucyrtidiidae Ehrenberg, 1847
             Subfamily Calocyclinae Haeckel, 1881
               Genus Theocoronoium Afanasieva & Amon, 2005, nom. null. see Genus Theocoronium Haeckel, 1887