[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875
     Family Heliodiscidae Haeckel, 1881
       Genus Heliodiscus Haeckel, 1862
         1 Heliodiscus asteriscus Haeckel, 1887
         2 Heliodiscus echiniscus Haeckel, 1887
         3 †Heliodiscus hexasteriscus Clark & Campbell, 1942
         4 †Heliodiscus tunicatus O'Connor, 1997