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 Stichocapsoidea Haeckel, 1881
           Family Stichocapsidae Haeckel, 1881
             Subfamily †Sethocapsinae Haeckel, 1881
               Genus †Tripodiscus Haeckel, 1881