Phylum Porifera Grant, 1836 - sponges Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885 Subclass †Lithistida Schmidt, 1870 Order Spirosclerophorida Reid, 1963 Suborder Rhizomorina Zittel, 1895 Family †Haplistiidae de Laubenfels, 1955 Genus †Varneycoelia Pickett, 1969