[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847 Family Theoperidae Haeckel, 1881 Genus Litharachnium Haeckel, 1860 1 Litharachnium eupilium Takahashi, 1991 2 Litharachnium tentorium Haeckel, 1860