[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847 Family Collosphaeridae Müller, 1858 Genus Acrosphaera Haeckel, 1881 Acrosphaera spinosa (Haeckel, 1862) †Acrosphaera spinosa echinoides (Haeckel, 1862)