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 Heterotardigrada Marcus, 1927 see Class Heterotardigrada Marcus, 1927
             Suborder Echiniscoidea Richters, 1926 see Order Echiniscoidea Richters, 1926
               Family Echiniscidae Thulin, 1928
                 1 Genus Parechiniscus Cuénot, 1926
                 2 Genus Echiniscus C.A.S. Schultze, 1840
                 3 Genus Pseudechiniscus Thulin, 1911
                 4 Genus Mopsechiniscus du Bois-Reymond Marcus, 1944