(Elrathina_antiqua,(Pachyaspis_deborra,((Syspacephalus_gregarius,Ptychoparella_sp_A),(Onchocephalus_thia,(((Maxicella_antelopea,(Eokochaspis_longspina,(Eokochaspis_cabinensis,((Pachyaspis_gallagari,Onchocephalus_maior),(Nyella_columbiana,(Schistometopus_minor,((Eokochaspis_piochensis,(Tonopahella_goldfieldensis,(Tonopahella_walcotti,((Amecephalus_arrojosensis,(Amecephalus_piochensis,(Amecephalus_agnesensis,Amecephalus_cleora))),((Kochina_americana,(Kochina_macrops,(Inglefieldia_porosa,((Kochiella_gracilis,(Kochiella_mackenziensis,(Kochiella_tuberculata,((Kochiella_maxeyi,(Kochiella_arenosa,(Kochiella_chares,Kochiella_mansfieldi))),(Kochiella_rasettii,(Kochiella_augusta,Kochiella_brevaspis)))))),(Kochiella_crito,Kochiella_eiffelensis))))),(Kochiellina_groomensis,Kochiellina_janglensis)))))),((Kochaspis_liliana,(Caborcella_arrojosensis,(Caborcella_pseudaulax,Caborcella_reducta))),(((Eokochaspis_nodosa,((Caborcella_collaris,Nyella_skapta),(Nyella_clinolimbata,(Nyella_immoderata,Parapoulsenia_lata)))),(Nyella_granosa,Nyella_rara)),(Nyella_plana,(Kochiella_gibbosa,(Hadrocephalites_cecinna,(Hadrocephalites_lyndonensis,(Hadrocephalites_convexus,Hadrocephalites_rhytidodes)))))))))))),(Eokochaspis_delamarensis,(Amecephalites_sundbergi,Eokochaspis_metalaspis)))),(Mexicella_obscurus,(Mexicella_robusta,(Mexicella_stator,(Mexicella_mexicana,(Mexicella_grandoculus,Mexicella_granulata)))))),(Amecephalus_sp_A,(Onchocephalus_depressus,Onchocephalus_fieldensis)))))));