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 †Euretidae Zittel, 1877
             1 Genus †Paleoramospongia Rigby & Pisera, 2001
             2 Genus †Paleoregulara Rigby & Pisera, 2001