Phylum Porifera Grant, 1836 - sponges Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885 Subclass Choristida Sollas, 1880 see Order Tetractinellida Marshall, 1876 Family †Cephaloraphiditidae Reid, 1968 Genus †Rhabdospongia Sollas, 1873[1872]