Suborder Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875 Family Ethmosphaeridae Haeckel, 1862 Genus Plegmosphaera Haeckel, 1881 1 Plegmosphaera pachypila Haeckel, 1887 2 Plegmosphaera lepticali Renz, 1976 3 Plegmosphaera oblonga Takahashi, 1991 4 Plegmosphaera spongiacea Haeckel 5 Plegmosphaera entodictyon Haeckel, 1887