[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847 Family Myelastridae Riedel, 1971 Genus Myelastrum Haeckel, 1881 Myelastrum quadrifolium Takahashi, 1991