[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847 Family Theoperidae Haeckel, 1881 Genus Eucyrtidium Ehrenberg, 1847 Eucyrtidium teuscheri Haeckel, 1887 †Eucyrtidium teuscheri orthoporus Caulet, 1985