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  Animalia
      Arthropoda
            Insecta
                    Plecoptera
                            Peltoperlidae
                                     Peltoperla
                                             Peltoperla campanula
                                             Peltoperla fenderi
                                             Peltoperla quadrispinula
                                     Rickera
                                             Rickera venusta
                                     Soliperla
                                             Soliperla tillamook
                                     Yoraperla
                                             Yoraperla mariana