Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
     Class Nassellaria Ehrenberg, 1847
       Order †Pylomariata Afanasieva, 1999
         Superfamily †Popofskyelloidea Deflandre, 1964
           Family †Popofskyellidae Deflandre, 1964
             1 Genus †Cyrtentactinia Foreman, 1963
             2 Genus †Popofskyellum Deflandre, 1964
             3 Genus †Totollum Schwartzapfel & Holdsworth, 1996
             4 Genus †Tuscaritellum Deflandre, 1972