Thyreophora

Thyreophora are the armoured dinosaurs: the name means 'shield-bearer'. It is a suborder of ornithischian dinosaurs. 

They are divided into these groups:
Various early herbivores which could be quadrupedal or bipedal.Gierliński, Gregard 1999. Tracks of a large thyreophoran from the Early Jurassic of Poland. Acta Palaeontologica Polonica 44.  Examples: the lightly armoured: Scutellosaurus, and Scelidosaurus.
 Ankylosauria
Ankylosaurids: armoured from their head to their club-ended tail.
Nodosaurids: no tail club but spikes and bony bumps on body.
 Stegosauria
Huayangosaurids: an early group from Middle Jurassic of China.
Stegosaurids: small heads and vertical plates and spines on body and tail. Upper Jurassic, Lower Cretaceous.

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