[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875
     Family Spongodiscidae Haeckel, 1862
       Genus †Perichlamydium Ehrenberg, 1847
         1 †Perichlamydium limbatum (Ehrenberg, 1844)
         2 †Perichlamydium praetextum (Ehrenberg, 1844)