Phylum Porifera Grant, 1836 - sponges Class Hexactinellida Schmidt, 1870 - hexactinellids Subclass Amphidiscophora Schulze, 1886 Order Reticulosa Reid, 1958 Superfamily Dierespongioidea Rigby & Gutschick 1976 Family †Aglithodictyidae Hall & Clarke, 1899 Genus †Protremadictyon Hurcewicz, 1985