[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Status: extant Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847 Status: extant Family Theoperidae Haeckel, 1881 Status: extant Genus †Bekoma Riedel & Sanfilippo, 1971 Status: fossil †Bekoma divaricata Foreman, 1973 Period: Paleogene (66 - 23.03 Ma); Status: fossil