Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Porifera Grant, 1836 - sponges
     Class Calcarea Bowerbank, 1864 - calcareous sponges
       Subclass Calcaronea Bidder, 1898
         1 Order Leucosolenida Hartman, 1958
         2 Order Lithonida Döderlein, 1892
         3 Order Baerida Borojevic, Boury-Esnault & Vacelet, 2000
         f1 Order Sycettida Bidder, 1898 see Order Leucosolenida Hartman, 1958
         f2 Order Stellispongiida Finks & Rigby, 2004
         f3 Order †Sphaerocoeliida Vacelet, 1979 [monotypic]