Phylum Porifera Grant, 1836 - sponges Class Calcarea Bowerbank, 1864 - calcareous sponges Subclass Calcaronea Bidder, 1898 Order Stellispongiida Finks & Rigby, 2004 Family †Stellispongiidae de Laubenfels, 1955 1 Subfamily †Stellispongiinae de Laubenfels, 1955 2 Subfamily †Holcospongiinae Finks & Rigby, 2004