Kingdom Animalia Linnaeus, 1758 - animals Phylum Porifera Grant, 1836 - sponges Class Demospongiae Sollas, 1885 - demosponges Subclass Lithistida Schmidt, 1870 Order Spirosclerophorida Reid, 1963 [monotypic] 1 Suborder Rhizomorina Zittel, 1895