Kingdom Animalia Linnaeus, 1758 - animals Phylum Porifera Grant, 1836 - sponges Class Demospongiae Sollas, 1885 - demosponges Subclass Lithistida Schmidt, 1870 Order Monalithistida Lagneau-Hérenger, 1955 1 Suborder †Megarhizomorina Schrammen, 1924 2 Suborder Sphaerocladina Schrammen, 1910