Phylum Porifera Grant, 1836 - sponges Class Hexactinellida Schmidt, 1870 - hexactinellids Subclass Amphidiscophora Schulze, 1886 Order Reticulosa Reid, 1958 Superfamily †Dictyospongioidea Hall & Clarke, 1899 Family †Dictyospongiidae Hall & Clarke, 1898 Subfamily †Dictyospongiinae Hall & Clarke, 1898 Genus †Polonoscyphia Hurcewicz, 1985