Classification
Biota [regio]Animalia [regnum]
Arthropoda [phylum]
Trilobita [classis]
Classis Trilobita contains the following taxa:
Agnostida [ordo]
Asaphida [ordo]
Cornyexochida [ordo]
Odontopleurida [ordo]
Phacopida [ordo]
Proetida [ordo]