Central Taxonomic Thesaurus
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  Animalia
      Arthropoda
        Crustacea
            Malacostraca
              Eumalacostraca
                  Eucarida
                    Decapoda
                      Pleocyemata
                        Astacidea
                               [Astacura]
                          Parastacoidea
                            Parastacidae
                                   [Austroastacidae]
                                     Parastacus
                                             Parastacus brasiliensis
                                             Parastacus defossus
                                             Parastacus laevigatus
                                             Parastacus nicoleti
                                             Parastacus pilimanus
                                             Parastacus pugnax
                                             Parastacus saffordi
                                             Parastacus varicosus
                                     Samastacus
                                             Samastacus araucanius
                                             Samastacus spinifrons