Classification
Biota [regio]Animalia [regnum]
Chordata [phylum]
Reptilia [classis]
Dinosauria [ordo]
Ornithischia [subordo]
Subordo Ornithischia contains the following taxa:
Ceratopsidae [familia]
Hadrosauridae [familia]
Iguanodontidae [familia]
Moyenisauropodidae [familia]
Protoceratopsidae [familia]
Stegosauridae [familia]