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
           Family †Pileospongiidae Rigby, Keyes & Horowitz, 1979 [monotypic]
             Genus †Pileospongia Rigby, Keyes & Horowitz, 1979