[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847
     Family Plagiacanthidae Hertwig, 1879
       Genus Clathrocanium Ehrenberg, 1860
         1 Clathrocanium coarctatum Ehrenberg, 1872
         2 Clathrocanium diadema Haeckel, 1887
         3 †Clathrocanium sphaerocephalum Haeckel, 1887