Kingdom Animalia Linnaeus, 1758 - animals Phylum Porifera Grant, 1836 - sponges Genus Terpios Duchassaing & Michelotti, 1864 1 Class Calcarea Bowerbank, 1864 - calcareous sponges 2 Class Hexactinellida Schmidt, 1870 - hexactinellids 3 Class Demospongiae Sollas, 1885 - demosponges