Phylum Porifera Grant, 1836 - sponges
   Class Calcarea Bowerbank, 1864 - calcareous sponges
     Subclass Calcaronea Bidder, 1898
       Order Sycettida Bidder, 1898 see Order Leucosolenida Hartman, 1958
         1 Family Sycettidae Dendy, 1893
         2 Family Grantiidae Dendy, 1893
         3 Family Leuconiidae Vosmaer, 1887 see Family Grantiidae Dendy, 1893
         4 Family Heteropiidae Dendy, 1893
         5 Family Amphoriscidae Dendy, 1893