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 †Phymaraphiniidae Schrammen, 1910
             2 Genus †Cycloclema Schrammen, 1910
             3 Genus †Lopadophorus Schrammen, 1910
             4 Genus †Pholidocladia Hinde, 1883
             5 Genus †Phymaraphinia Schrammen, 1901
             6 Genus †Polyrhipidium Schrammen, 1924
             7 Genus †Prokaliapsis Schrammen, 1901