[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875 Family Coccodiscidae Haeckel, 1862 Genus Didymocyrtis Haeckel, 1860 †Didymocyrtis antepenultima (Riedel & Sanfilippo, 1970)