Phylum Porifera Grant, 1836 - sponges Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885 Subclass †Lithistida Schmidt, 1870 Order Monalithistida Lagneau-Hérenger, 1955 Suborder Sphaerocladina Schrammen, 1910 Family †Lecanellidae Schrammen, 1924 Genus †Poterionella Pocta, 1903