Phylum Porifera Grant, 1836 - sponges Class Calcarea Bowerbank, 1864 - calcareous sponges Order †Sphaerocoelida Vacelet, 1979 see Order Sphaerocoeliida Vacelet, 1979 Family †Sphaerocoeliidae Steinmann, 1882 Genus †Thalamopora Römer, 1840