Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
     Class †Aculearia Afanasieva, 1999
       Order Fasciculata Afanasieva & Amon, 2003
         Family Plagiacanthidae Hertwig, 1879
           Subfamily Plagiacanthinae Hertwig, 1879
             Genus Deflandrella Loeblich & Tappan, 1961, nom. nov.