Phylum Porifera Grant, 1836 - sponges
   Class Hexactinellida Schmidt, 1870 - hexactinellids
     Subclass Hexasterophora Schulze, 1886
       Order Lyssacinosa Zittel, 1877 see Order Lyssacinosida Zittel, 1877
         Superfamily †Brachiospongioidea Beecher, 1889
           Family †Brachiospongiidae Beecher, 1889
             1 Genus †Brachiospongia Marsh, 1867
             2 Genus †Colpospongia Lamont, 1935
             3 Genus †Rhaeaspongia Lamont, 1935
             4 Genus †Fistellaspongia Rigby & Maher, 1995