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