Subphylum: Chelicerata
Class: Trilobita

Trilobite Order: CORYNEXOCHIDA

    Suborder: Corynexochina
          Superfamily: Corynexochoidea
                Family: Amgaspididae
                Family: Corynexochidae
                Family: Oryctocephalidae
                Family: Chengkouiidae
                Family: Dorypygidae
                Family: Oryctocephalidae
                Family: Dolichometopidae
                Family: Edelsteinaspidae
                Family: Jakutidae
                Family: Zacanthoididae
                Family: Dinesidae 
    Suborder: Illaenina
          Superfamily: Illaenoidea
                Family: Scutelluidae
                Family: Styginidae
                Family: Illaenidae
                Family: Panderidae
                Family: Tsinaniidae 
    Suborder: Leiostegiina
          Superfamily: Leiostegioidea
                Family: Leiostegiidae
                Family: Pagodiidae
                Family: Kaolishaniidae
                Family: Cheilocephalidae
                Family: Illaenuridae
                Family: Shirakellidae
                Family: Ordosiidae