Phylum Porifera Grant, 1836 - sponges Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885 Subclass Ceractinomorpha Lévi, 1953 see Class Demospongiae Sollas, 1885 Order Haplosclerida Topsent, 1928 Family Petrosiidae van Soest, 1980 1 Genus †Propetrosia Pisera & Busquets, 2002 2 Genus †Petrosia Vosmaer, 1887