Kingdom Animalia Linnaeus, 1758 - animals Phylum Porifera Grant, 1836 - sponges Class Demospongiae Sollas, 1885 - demosponges Order "Lithistida" Schmidt, 1870 [polyphyletic] - lithistids see Subclass Lithistida Schmidt, 1870 Family Isoraphinidae Schrammen, 1924 [monotypic] see Family Isoraphiniidae Schrammen, 1924