Phylum Porifera Grant, 1836 - sponges Class Demospongiae Sollas, 1885 - demosponges Order Haplosclerida Topsent, 1928 1 Suborder Haplosclerina Topsent, 1928 2 Suborder Petrosina Boury-Esnault & van Beveren, 1982 3 Suborder Spongillina Manconi & Pronzato, 2002 - freshwater sponges see Order Spongillida Cárdenas, Pérez & Boury-Esnault, 2012