Phylum Porifera Grant, 1836 - sponges
   Class Hexactinellida Schmidt, 1870 - hexactinellids
     Subclass Amphidiscophora Schulze, 1886
       Order Amphidiscosa Schrammen, 1924 see Order Amphidiscosida Schrammen, 1924
         Family Hyalonematidae Gray, 1857
           Genus †Hyalonema Gray, 1832