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Ankylosaurus was an armored dinosaur that lived at the very end of the Cretaceous Period between about 66.5–65.5 Ma ago in western North America. Ankylosaurus was about 30 ft long 5 feet at the hip, and weighed in excess of 3-4 tons This dinosaur was covered in armor plating called osteoderms, from nose tip to the end of it's tail where it sported a massive tail club which was made up of several large osteoderms, which were fused to the last few tail vertebrae. Although complete skeletons have not been found of Ankylosaurus several other dinosaurs that have similar features are represented by more complete fossil skeletons, including Euoplocephalus, Pinacosaurus, all part of the family Ankylosauridae. Ankylosaurids are members of the larger group Ankylosauria, which also includes the nodosaurids. Ankylosaurus is often considered the archetypal armored dinosaur and was the largest known member of the family.
Skull and teeth
Ankylosaurus skull was a low heavily armored triangular , and fused and re-enforced like all other parts of it's body. They even had armor on they're eyelids. Like other ankylosaurs, Ankylosaurus lacked the grinding tooth batteries of the other herbivorous ceratopsid and hadrosaurid dinosaurs. Instead Ankylosaurs had small, leaf-shaped teeth designed to crop vegetation. These teeth were small, when compared it's the body mass. It also swallowed gastroliths to compinsate for weaker teeth.
Tail club and defense
The ankylosaurs were known for their tail clubs. This is definitely a step up from the spikes of the stegosaurids. This was more like a wrecking ball. A single blow from a weapon like this could mortally wound or kill any predator. This tail club, fused with otseoderms and bony tendons fusing the tail allowing the club to be swung with extreme force. This would have been enough to shatter a tyrannosaurids legs completely. Some paleontologists have suggested that it could also have been used as a false head, although this theory isn't widely excepted. Ankylosaurus only vulnerability was its belly which did not have armor. If a T-rex somehow managed to flip an ankylosaurus on it's back, then anky would be powerless. It could still swing it's tail club but this could be easily avoided by a cautious T-rex.
- Ankylosaurus Fact Sheet - EnchantedLearning.com
Ankylosaurus Fact Sheet. Ankylosaurus was a huge, armored plantt-eating dinosaur that lived during the Cretaceous period.
- Ankylosaurus, Ankylosaurus dinosaur, Ankylosaurus Facts, Ankylosaurus Pictures, Ankylosaurus Habitat
Ankylosaurus Dinosaur the most famous armored dinosaurs known as the Ankylosaurians which is weighed up to 4.5 metric tons and its legs were short, with the stern legs longer than the forelegs.
Information on the Ankylosaurus including pictures, facts, and a short biography.