Subclass Radiolaria Müller, 1858 see Phylum Actinopoda Calkins, 1902 Order Polycystina Ehrenberg, 1838 see Class Polycystina Ehrenberg, 1838 Suborder Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875 Family Phacodiscidae Haeckel, 1881 see Subfamily Coccodiscinae Haeckel, 1862 1 Genus Heliodiscus Haeckel, 1862