[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875
     Family Spongodiscidae Haeckel, 1862
       Genus Spongotrochus Haeckel, 1860
         1 †Spongotrochus americanus Kozlova & Gorbovets, 1966
         2 Spongotrochus glacialis Popofsky, 1908
         3 †Spongotrochus longispinus Haeckel, 1860
         4 †Spongotrochus vitabilis Goll & Bjørklund, 1989