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 †Proventocitoidea Aitchison, 1998 [monotypic]
           Family †Proventocitidae Aitchison, 1998
             1 Genus †Procyrtis Li, 1995
             2 Genus †Proventocitum Nazarov & Ormiston, 1990
             3 Genus †Ulcundia Nazarov, 1974