Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
     Class Sphaerellaria Haeckel, 1881
       Order Sphaerellata Haeckel, 1887
         Family †Parvivaccidae Pessagno & Yang, 1989
           Subfamily †Acaeniotylinae Yang, 1993
             1 Genus †Acaeniotyle Foreman, 1973
             2 Genus †Acaeniotylopsis Kito & De Wever, 1994
             3 Genus †Acastea Yang, 1993
             4 Genus †Acusten Yang, 1993
             5 Genus †Nolita Hull, 1997
             6 Genus †Novitripus Hull, 1997
             7 Genus †Praeconosphaera Yang, 1993