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  Animalia
      Arthropoda
        Crustacea
            Malacostraca
              Eumalacostraca
                  Eucarida
                    Decapoda
                      Pleocyemata
                        Brachyura
                               [Archaeobrachyura]
                               [Brachyrhyncha]
                               [Cancridea]
                               [Dromiacea]
                               [Oxyrhyncha]
                               [Oxystomata]
                          Majoidea
                            Oregoniidae
                                     Chionoecetes
                                             Chionoecetes angulatus
                                             Chionoecetes bairdi
                                             Chionoecetes opilio
                                               Chionoecetes opilio opilio
                                             Chionoecetes tanneri
                                     Hyas
                                             Hyas araneus
                                             Hyas coarctatus
                                               Hyas coarctatus alutaceus
                                               Hyas coarctatus coarctatus
                                             Hyas lyratus
                                     Macroregonia
                                             Macroregonia macrochira
                                     Oregonia
                                             Oregonia bifurca
                                             Oregonia gracilis