organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Animalia Linnaeus, 1758 - animals
     Eumetazoa Bütschli, 1910 - eumetazoans
       Phylum Cnidaria Hatschek, 1888 - cnidarians
         Medusozoa Petersen, 1979 see Subphylum Medusozoa Petersen, 1979
           Class Hydrozoa Owen, 1843
             Genus Cordylophora Allman, [1843]
               Cordylophora caspia (Pallas, 1771) - freshwater hydroid