Phylum Porifera Grant, 1836 - sponges 1 Class Demospongiae Sollas, 1885 - demosponges 2 Class Calcarea Bowerbank, 1864 - calcareous sponges 3 Class Hexactinellida Schmidt, 1870 - hexactinellids 5 Class †Archaeocyatha Bornemann, 1884