[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlentera
       Phylum Porifera Grant, 1836 - sponges
         Class Fibrospongiæ
           1 Genus Euspongia Bronn, 1859 see Subgenus Spongia Linnaeus, 1759
           2 Genus Spongilla Lamarck, 1816
           3 Genus Thethya Cuvier, 1817, nom. null. see Genus Tethya Lamarck, 1814
           4 Genus Euplectella Owen, 1841