Phylum Porifera Grant, 1836 - sponges Class Hexactinellida Schmidt, 1870 - hexactinellids Subclass Amphidiscophora Schulze, 1886 Order Amphidiscosa Schrammen, 1924 see Order Amphidiscosida Schrammen, 1924 Family †Pattersoniidae Miller, 1889 1 ?Genus †Chirospongia Miller, 1889 2 Genus †Pattersonia Miller, 1882 3 ?Genus †Strobilospongia Beecher, 1889