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  Animalia
      Arthropoda
        Hexapoda
               [Apterygota]
            Insecta
              Pterygota
                Neoptera
                       [Endopterygota]
                       [Exopterygota]
                    Diptera
                      Nematocera
                             [Anisopodoidea]
                             [Bibionoidea]
                             [Culocoidea]
                             [Mycetophiloidea]
                             [Psychodoidea]
                             [Tipuloidea]
                        Bibionomorpha
                            Pleciidae
                                     Penthetria
                                             Penthetria heteroptera
                                                   [Bibio heteroptera]
                                                   [Penthetria atra]
                                                   [Penthetria lugubris]
                                                   [Plecia longipes]
                                     Plecia
                                             Plecia americana
                                             Plecia nearctica