Kingdom Animalia Linnaeus, 1758 - animals Phylum Porifera Grant, 1836 - sponges Class Calcarea Bowerbank, 1864 - calcareous sponges 1 Subclass Calcinia see Subclass Calcinea Bidder, 1898 2 Subclass Calcaronia see Subclass Calcaronea Bidder, 1898 3 Subclass Pharetronidia 4 Subclass Sphinctozoa Hartman, 1982 see Order Sphinctozoa (Steinmann, 1882)