living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Cnidaria Hatschek, 1888 - cnidarians
           Class Hydrozoa Owen, 1843
             Order Hydroida Johnston, 1836 - hydroids see Order Anthoathecatae
               Suborder Leptomedusae see Order Leptothecatae
                 Family Melicertidae Agassiz, 1862
                   1 Genus Melicertoides Kramp, 1959
                   2 Genus Melicertum Goldfuss, 1820
                   3 Genus Nectocertoides
                   4 Genus Orchistomella Kramp, 1959