Kingdom Animalia Linnaeus, 1758 - animals Phylum Porifera Grant, 1836 - sponges Class Demospongiae Sollas, 1885 - demosponges Subclass Lithistida Schmidt, 1870 Order Megalithistida Reid, 2004 1 Suborder †Helomorina Schrammen, 1924 [monotypic] 2 Suborder Megamorina Zittel, 1878