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  Animalia
      Acanthocephala
            Palaeacanthocephala
                    Echinorhynchida
                            Heteracanthocephalidae
                              Aspersentinae
                                     Aspersentis
                                             Aspersentis johni
                                                   [Rhadinorhynchus johni]
                                             Aspersentis megarhynchus
                                                   [Aspersentis austrinus]
                                                   [Echinorhynchus megarhynchus]
                                                   [Rhadinorhynchus wheeleri]
                              Heteroacanthocephalinae
                                     Heteroacanthocephalus
                                             Heteroacanthocephalus hureaui
                                             Heteroacanthocephalus peltorhamphi
                                                   [Rhadinorhynchus peltorhamphi]
                                     Sachalinorhynchus
                                             Sachalinorhynchus skrjabini