Phylum Porifera Grant, 1836 - sponges
   Subphylum Hexactinellida Schmidt, 1870 see Class Hexactinellida Schmidt, 1870
     Class Hexasterophora F.E. von Schulze see Subclass Hexasterophora Schulze, 1886
       Order Hexactinosida Schrammen, 1903
         1 Family Farreidae Gray, 1872
         2 Family Aphrocallistidae Gray, 1867
         3 Family Euretidae Zittel, 1877
         4 Family Craticulariidae Rauff, 1893
         5 Family Tretodictyidae Schulze, 1886
         6 Family Aulocalycidae Ijima, 1927