Phylum Porifera Grant, 1836 - sponges Class Hexactinellida Schmidt, 1870 - hexactinellids Subclass Amphidiscophora Schulze, 1886 Order Reticulosa Reid, 1958 Superfamily †Dictyospongioidea Hall & Clarke, 1899 Family †Stereodictyidae Finks, 1960