Ankylosaurus is a genus of armored dinosaurs that lived during the Late Cretaceous period, around 66 million years ago. The name Ankylosaurus means “fused lizard” referring to its heavily armored body. It was a large herbivorous dinosaur, measuring up to 30 feet in length and weighing up to 6.5 tons.

Ankylosaurus had a unique armor plating that covered its back and tail, which was made up of bony plates called osteoderms. Its body was also covered in thick, bony knobs, making it one of the best-armored dinosaurs known. It also had a club-like tail that it could use as a weapon against predators.

Ankylosaurus was a quadrupedal animal, with short, stocky legs that were used to support its heavy body.