Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987
Period: Cambrian - Present [541 Mya - present]; Status: extant
   Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838
  Period: Cambrian - Present [541 Mya - present]; Status: extant
     Class Spumellaria Ehrenberg, 1875
    Period: Middle Cambrian - Present [509 Mya - present]; Status: extant
       Order Saturnalata Afanasieva & Amon, 2005
      Period: Middle Triassic - Present [247.2 Mya - present]; Status: extant
         Family Saturnalidaeᵀ Deflandre, 1953
        Period: Late Triassic - Present [237 Mya - present]; Status: extant
           Subfamily †Heliosaturnalinae Kozur & Mostler, 1972
          Period: Late Triassic - Early Jurassic [237 - 174.1 Mya]; Status: fossil
             Genus †Parasaturnalis Kozur & Mostler, 1972
            Status: fossil