Central Taxonomic Thesaurus
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  Animalia
      Arthropoda
        Crustacea
            Malacostraca
              Eumalacostraca
                  Eucarida
                    Decapoda
                      Pleocyemata
                        Brachyura
                               [Archaeobrachyura]
                               [Brachyrhyncha]
                               [Cancridea]
                               [Dromiacea]
                               [Oxyrhyncha]
                               [Oxystomata]
                          Grapsoidea
                            Plagusiidae
                                     Euchirograpsus
                                             Euchirograpsus americanus
                                             Euchirograpsus antillensis
                                     Percnon
                                             Percnon abbreviatum
                                             Percnon affine
                                             Percnon gibbesi
                                             Percnon planissimum
                                     Plagusia
                                             Plagusia depressa
                                               Plagusia depressa depressa
                                               Plagusia depressa tuberculata
                                             Plagusia squamosa