Phylum Porifera Grant, 1836 - sponges
   Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885
     Subclass Ceractinomorpha Lévi, 1953 see Class Demospongiae Sollas, 1885
       1 Order Dictyoceratida Minchin, 1900
       2 Order Dendroceratida Minchin, 1900
       3 Order Verongida Bergquist, 1978
       4 Order Halichondrida Vosmaer, 1887
       5 Order Poecilosclerida Topsent, 1928
       6 Order Haplosclerida Topsent, 1928
       7 Order †Agelasida Hartman, 1980
       8 Order Vaceletida Finks & Rigby, 2004
       9 Order †Sigmatosclerophorida Burton, 1956 [monotypic]