[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Status: extant Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847 Status: extant Family Cannobotryidae Haeckel, 1881 Status: extant Genus Centrobotrys Petrushevskaya, 1965 Status: extant †Centrobotrys gravida Moore, 1971 Period: Paleogene (66 - 23.03 Ma); Status: fossil