[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847
     Family Trissocyclidae Haeckel, 1881 see Family Acanthodesmiidae Haeckel, 1862
       Genus †Lithocircus Müller, 1856
         1 †Lithocircus rhombus Pantanelli, 1880
         2 †Lithocircus toxaria (Haeckel, 1887)