Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Coelenterata Hatschek, 1888 see Infrakingdom Coelenterata Leuckart, 1847
         Phylum Cnidaria Hatschek, 1888 - cnidarians
           Class Hydrozoa Owen, 1843
             Order Thecaphora
               Family Campanulariidae Hincks, 1868
                 Genus Obelia Péron & Lesueur, 1810
                   [Obelia geniculata (Linnaeus, 1758) - knotted thread hydroid]