[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875 Family Spongodiscidae Haeckel, 1862 Genus Spongaster Ehrenberg, 1860 Spongaster tetras Ehrenberg, 1860 †Spongaster tetras tetras Ehrenberg, 1860