[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlentera
       Phylum Nematophora Huxley, 1850
         I Class Hydromedusæ see Class Hydrozoa Owen, 1843
         II Class Podactinaria [monotypic]
         III Class Discomedusæ [monotypic]
         IV Class Hydrocorallinæ Mosley
         V Class Anthozoa Ehrenberg, 1831
         VI Class Ctenophora Eschscholtz, 1829 see Phylum Ctenophora Eschscholtz, 1829