Phylum Porifera Grant, 1836 - sponges Class Hexactinellida Schmidt, 1870 - hexactinellids Subclass Hexasterophora Schulze, 1886 Order Hexactinosa Schrammen, 1903 see Order Hexactinosida Schrammen, 1903 Superfamily Pileolitoidea Finks, 1960 Family †Pileolitidae Finks, 1960 Genus †Hexactinoderma Pisera & Bodzioch, 1991