Phylum Porifera Grant, 1836 - sponges
   Class Hexactinellida Schmidt, 1870 - hexactinellids
     Subclass Amphidiscophora Schulze, 1886
       Order Reticulosa Reid, 1958
         Superfamily †Protospongioidea Hinde, 1887 [monotypic]
           1 Family †Protospongiidae Hinde, 1887