Phylum Porifera Grant, 1836 - sponges
   Class Hexactinellida Schmidt, 1870 - hexactinellids
     Subclass Hexasterophora Schulze, 1886
       Order Hexactinosa Schrammen, 1903 see Order Hexactinosida Schrammen, 1903
         Superfamily Pileolitoidea Finks, 1960
           1 Family †Pileolitidae Finks, 1960
           2 Family †Wareembaiidae Finks & Rigby, 2004
           3 Family †Euretidae Zittel, 1877
           4 Family †Craticulariidae Rauff, 1893
           5 Family †Pileospongiidae Rigby, Keyes & Horowitz, 1979 [monotypic]