Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Porifera Grant, 1836 - sponges
     Class Demospongiae Sollas, 1885 - demosponges
       Order Hadromerida Topsent, 1894
         01 Family Acanthochaetetidae Fischer, 1970
         02 Family Clionaidae d'Orbigny, 1851
         03 Family Hemiasterellidae Lendenfeld, 1889
         04 Family Placospongiidae Gray, 1867
         05 Family Polymastiidae Gray, 1867
         06 Family Spirastrellidae Ridley & Dendy, 1886
         07 Family Stylocordylidae Topsent, 1928 [monotypic]
         08 Family Suberitidae Schmidt, 1870
         09 Family Tethyidae Gray, 1867
         10 Family Timeidae Topsent, 1928 [monotypic]
         11 Family Trachycladidae Hallmann, 1917