Thyreophora is a group of armoured Dinosaurs, part of the Ornitischia.
*Scutellosaurus has no actual family. He is the first thyreophoran despite not being part of the groups listed above.
They lived from the Triassic to the Cretaceous (229-65 Mya).
- The Stegosaurs are the only thyreophorans that did not survive until the great extinction, since they died out 135 Mya.