[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847 Family Artostrobiidae Riedel, 1967 Genus Phormostichoartus Campbell, 1951 †Phormostichoartus doliolum Riedel & Sanfilippo, 1971