Phylum Porifera Grant, 1836 - sponges
   Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885
     Subclass †Lithistida Schmidt, 1870
       Order †Orchocladina Rauff, 1895
         1 Family †Anthaspidellidae Miller, 1889
         2 Family †Streptosolenidae Johns, 1994
         3 Family †Chiastoclonellidae Rauff, 1895
         4 Family †Anthracosyconidae Finks, 1960
         5 Family †Astylospongiidae Zittel, 1877