[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Plastidozoa [monotypic]
     [Phylum] Protozoa (Goldfuss, 1818) C.T. von Siebold, 1854 see Kingdom Protozoa Goldfuss, 1818
       Grade Gymnomyxa
         Class Gymnomyxa
           Order Radiolaria Müller, 1858 see Phylum Actinopoda Calkins, 1902
             1 Genus Sphærozoon Lankester, 1877, nom. null. see Genus Sphaerozoum Meyen, 1834
             2 Genus Acanthometra Müller, 1855
             3 Genus Actinospherium Lankester, 1877, nom. null. see Genus Actinosphaerium Stein, 1857