Phylum Porifera Grant, 1836 - sponges 1 Class Demospongiae Sollas, 1885 - demosponges 2 Class Calcarea Bowerbank, 1864 - calcareous sponges 3 Class †Heteractinida de Laubenfels, 1955 4 Class †Stromatoporoidea Nicholson & Murie, 1878 5 Class †Archaeocyatha Bornemann, 1884 6 ?Class †Radiocyatha Debrenne, Termier & Termier, 1970 7 Class †Cribricyatha