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  Animalia
      Arthropoda
        Chelicerata
            Arachnida
                    Araneae
                      Labidognatha
                            Theridiidae
                                     Ariamnes
                                             Ariamnes mexicanus
                                     Asagena
                                             Asagena medialis
                                     Episinus
                                             Episinus erythrophthalmus
                                     Latrodectus
                                             Latrodectus hesperus
                                             Latrodectus mactans
                                     Theridion
                                             Theridion cochise