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 Trachylina Haeckel, 1879 - trachyline medusae
               Suborder Trachymedusae Haeckel, 1866
                 Family Halicreatidae Fewkes, 1886
                   1 Genus Botrynema Browne, 1908
                   2 Genus Halicreas Fewkes, 1882
                   3 Genus Haliscera Vanhöffen, 1902
                   4 Genus Halitrephes Bigelow, 1909