living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryotae see Domain Eukaryota Chatton, 1925
     Animalia Linnaeus, 1758 - animals
       Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Arthropoda Siebold, 1848 - arthropods
           Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
             Malacostraca Latreille, 1802 see Class Malacostraca Latreille, 1802
               Eucarida Calman, 1904
                 Decapoda Latreille, 1802 - decapods
                   Pleocyemata Burkenroad, 1963
                     Brachyura Latreille, 1802 - true crabs
                       Oxyrhyncha Dana see Subsection Heterotremata Guinot, 1977
                         Majoidea Samouelle, 1819
                           Majidae Samouelle, 1819
                             Macrocheira de Haan, 1839
                               Macrocheira kaempferi (Temminck, 1836) - giant Japanese spider crab