[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847
     Family Theoperidae Haeckel, 1881
       Genus Sethoconus Haeckel, 1887
         1 Sethoconus myxobrachia Strelkov, 1959
         2 Sethoconus tabulatus Haeckel, 1887