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Animantarx: a nodosaur
Euoplocephalus, an ankylosaur

Ankylosaurs were armoured dinosaurs of the suborder Thyreophora. They include two distinct groups:

  • Ankylosauria
    • Ankylosauridae: armoured from their head to their club-ended tail.
    • Nodosauridae: no tail club but spikes and bony bumps on body.