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 Theonellidae Lendenfeld, 1903
             Subfamily †Acrochordoniinae Schrammen, 1910
               Genus †Phyllodermia Schrammen, 1924
                 Subgenus †P. (Cladodermia) Schrammen, 1924