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 Tardigrada Doyère, 1840 - tardigrades
           Order Eutardigrada Richters, 1926 see Class Eutardigrada Richters, 1926
             Family Macrobiotidae Thulin, 1928
               Genus Hypsibius Ehrenberg, 1848
                 Subgenus Isohypsibius (Thulin, 1928) Marcus, 1929 see Genus Isohypsibius Thulin, 1928
                   1 Hypsibius annulatus (Murray, 1905) see Isohypsibius annulatus (Murray, 1905)
                   2 Hypsibius stenostomus (Richters, 1908) see Isohypsibius stenostomus (Richters, 1908)