Phylum Porifera Grant, 1836 - sponges Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885 Subclass †Lithistida Schmidt, 1870 Order Tetralithistida Lagneau-Hérenger, 1962 Suborder Tetracladina Zittel, 1878 Family Siphoniidae d'Orbigny, 1851 Subfamily †Lerouxiinae Moret, 1926