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