Phylum Porifera Grant, 1836 - sponges Class Hexactinellida Schmidt, 1870 - hexactinellids Subclass Hexasterophora Schulze, 1886 Order Lyssacinosa Zittel, 1877 see Order Lyssacinosida Zittel, 1877 Superfamily †Crepospongioidea Finks & Rigby, 2004 [monotypic] 1 Family †Crepospongiidae Finks & Rigby, 2004 [monotypic]