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 Anthomedusae see Order Anthoathecatae
                 01 Family Acaulidae Fraser, 1924
                 02 Family Asyncorynidae Kramp, 1949
                 03 Family Bougainvilliidae Lütken, 1850
                 04 Family Calycopsidae
                 05 Family Candelabridae Stechow, 1921
                 06 Family Cladocorynidae Allman, 1872
                 07 Family Cladonematidae Gegenbaur, 1857
                 08 Family Clavidae McCrady, 1859
                 09 Family Codonidae
                 10 Family Corymorphidae Allman, 1872
                 11 Family Corynidae Johnston, 1836
                 12 Family Cytaeidae L. Agassiz, 1862
                 13 Family Eleutheriidae
                 14 Family Eudendriidae L. Agassiz, 1862
                 15 Family Halocordylidae
                 16 Family Hydractiniidae L. Agassiz, 1862
                 17 Family Hydridae Dana, 1846
                 18 Family Hydrocorynidae Rees, 1957
                 19 Family Margelopsidae Mayer, 1910
                 20 Family Myriothelidae
                 21 Family Pandeidae Haeckel, 1879
                 22 Family Pennariidae McCrady, 1859
                 23 Family Polyorchidae
                 24 Family Ptilocodiidae Coward, 1909
                 25 Family Rathkeidae Russell, 1953
                 26 Family Rhysiidae A. Brinckmann, 1965
                 27 Family Russelliidae
                 28 Family Solanderiidae Marshall, 1892
                 29 Family Teissieridae Bouillon, 1978
                 30 Family Tiarannidae Russell, 1940
                 31 Family Tricyclusidae Kramp, 1949
                 32 Family Tubulariidae Goldfuss, 1818
                 33 Family Zancleidae Russell, 1953
                 34 Family Zancleopsidae Bouillon, 1978
                 36 Genus Dicoryne Allman, 1859