Genera "Neostrabops", "Duslia", "Triopus", "Pseudarthron" and "Cheloniellon" (Dunlop & Selden 1997).
Genera "Neostrabops", "Duslia", "Triopus", "Pseudarthron" and "Cheloniellon" (Budd). The other three are Trilobita, Aglaspidida and Strabopida (Dunlop & Selden 1997).