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
         Family Aulocalycidae Ijima, 1927
           Genus Aulocalyx Schulze, 1886
           Genus Euryplegma Schulze, 1886
           Genus Fieldingia Kent, 1870
           Genus Rhabdodictyum Schmidt, 1880
           Genus Tretopleura Ijima, 1927