[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875
     Family Spongodiscidae Haeckel, 1862
       Genus †Amphymenium Haeckel, 1881
         1 †Amphymenium amphistylium Haeckel, 1887
         2 †Amphymenium challengerae Weaver, 1983
         3 †Amphymenium splendiarmatum Clark, 1942