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
             Genus †Pholidocladia Hinde, 1883
               1 Subgenus †P. (Pholidocladia) Hinde, 1883 see Genus Pholidocladia Hinde, 1883
               2 Subgenus †P. (Stelidium) Schrammen, 1924, nom. illeg. see Genus Vermiculissimum de Laubenfels, 1955