Class Actinopoda Calkins, 1902 see Parvkingdom Actinopoda Calkins, 1902
   Subclass Radiolaria Müller, 1858 see Phylum Actinopoda Calkins, 1902
     Superorder Polycystina Ehrenberg, 1838 see Class Polycystinea Ehrenberg, 1838
       Order Entactinaria Kozur & Mostler, 1982 see Order Entactiniata Kozur & Mostler, 1982
         Family Hexalonchidae Haeckel, 1881
           1 Genus Heterosoma Mast, 1910, nom. illeg. see Genus Anomalosoma Loeblich & Tappan, 1961
           2 Genus Hexacontium Haeckel, 1881
           3 Genus Hexaloncheᵀ Haeckel, 1881
           4 Genus Hollandosphaera Deflandre, 1973
           5 Genus Nanina Kozur & Mostler, 1982, nom. illeg. see Genus Pentactinosphaera Nagata & Nishimura, 1983
           6 Genus Tetrapetalon Hollande & Enjumet, 1960