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Updated May 8, 2019 | Infoplease Staff


Meaning of Name:“bent; crooked lizard”
Period:Cretaceous Period (138 million to 65 million years ago)
Size: 4 - 9 meters long
Location: Texas, Antarctica, Utah, and Argentina

Not only is Ankylosaurus the widest of all dinosaurs, but it's the most heavily armored, with bony plates, studs, and spikes lining its entire back-even its eyelids have spikes. In addition, its tail has a thick knob of bone at the end of it, believed to have been used as a very formidable club against its enemies.

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