[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlentera
       Phylum Porifera Grant, 1836 - sponges
         Class Calcispongiæ see Class Calcarea Bowerbank, 1864
           1 Genus Ascon Haeckel, 1872, nom. nud. see Genus Ascon Lendenfeld 1885
           2 Genus Leucon Haeckel, 1872, nom. illeg.
           3 Genus Sycon Risso, 1826