organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Animalia Linnaeus, 1758 - animals
     Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
       Radiata Linnaeus, 1758 - radiates see Subkingdom Radiata (Linnaeus, 1758) Cavalier-Smith, 1983
         Phylum Cnidaria Hatschek, 1888 - cnidarians
           Genus Hydra Linnaeus, 1758
             Hydra viridis Linnaeus, 1767 see Chlorohydra viridissima (Pallas, 1766)