[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875
     Family Litheliidae Haeckel, 1862
       Genus Lithelius Haeckel, 1860
         1 †Lithelius foremanae Sanfilippo, 1973
         2 Lithelius minor Jørgensen, 1900
         3 Lithelius nautiloides Popofsky, 1908
         4 †Lithelius spiralis Haeckel, 1860