[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlentera
       Phylum Porifera Grant, 1836 - sponges
         I Class Calcispongiæ see Class Calcarea Bowerbank, 1864
         II Class Fibrospongiæ
         III Class Myxospongiæ Haeckel, 1866 see Subclass Myxospongiae Haeckel, 1866