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  Animalia
      Arthropoda
        Hexapoda
               [Apterygota]
            Insecta
              Pterygota
                Palaeoptera
                       [Paleoptera]
                    Ephemeroptera
                      Pisciforma
                            Acanthametropodidae
                                     Acanthametropus
                                           [Metreturus]
                                             Acanthametropus nikolskyi
                                             Acanthametropus pecatonica
                                                   [Metreturus pecatonica]
                                     Analetris
                                             Analetris eximia