Phylum Porifera Grant, 1836 - sponges Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885 Subclass Ceractinomorpha Lévi, 1953 see Class Demospongiae Sollas, 1885 Order Vaceletida Finks & Rigby, 2004 Family Verticillitidae Steinmann, 1882 Subfamily †Polysiphospongiinae Senowbari-Daryan, 1990 [monotypic] Genus †Polysiphospongia Senowbari-Daryan & Schafer, 1986