Porifera Grant, 1836 - sponges
   Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885
     †Lithistida Schmidt, 1870
       Tetralithistida Lagneau-Hérenger, 1962
         Tetracladina Zittel, 1878
           Siphoniidae d'Orbigny, 1851
             1 Siphoniinae d'Orbigny, 1851 see Family Siphoniidae d'Orbigny, 1851
             2 †Phymatellinae Schrammen, 1910 see Family Phymatellidae Schrammen, 1910
             3 †Lerouxiinae Moret, 1926