Phylum Porifera Grant, 1836 - sponges
Class Calcarea Bowerbank, 1864 - calcareous sponges
1 Order †Heteractinida Hinde, 1887
see Class Heteractinida de Laubenfels, 1955
2 Order Clathrinida Hartman, 1958
3 Order Murrayonida Vacelet, 1981
4 Order Leucosolenida Hartman, 1958
5 Order Lithonida Döderlein, 1892
6 Order Baerida Borojevic, Boury-Esnault & Vacelet, 2000
7 Order †Sphaerocoelida Vacelet, 1979
see Order Sphaerocoeliida Vacelet, 1979