[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847 Family Plagiacanthidae Hertwig, 1879 Genus †Rhabdolithis Ehrenberg, 1847 1 †Rhabdolithis ellida Sanfilippo & Riedel, 1973 2 †Rhabdolithis pipa Ehrenberg, 1854