Suborder Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875 1 Family Collosphaeridae Müller, 1858 2 Family Ethmosphaeridae Haeckel, 1862 3 Family Actinommidae Haeckel, 1862 4 Family Tholoniidae Haeckel, 1887 5 Family Porodiscidae see Family Spongodiscidae Haeckel, 1862 6 Family Spongodiscidae Haeckel, 1862 7 Family Myelastridae Riedel, 1971