was the last, main, and most famous of the armored
known as the Ankylosaurians. Its back and
sides were covered with a stiff shell of armor,
but its underbelly was uncovered. It also had a great club-like
tail that might be used for defense against predators. Ankylosaurus
was about the size of an elephant, but had a low-slung,
extremely wide body.
Description of Ankylosaurus Dinosaur
Dinosaur weighed up to 4.5 metric
tons (5 tons), and were about 10 meters
(30 feet) long. While they were 1.8 meters
(6 feet) wide, there were only 1.2 meters(4 feet) high. Its legs were short, with
the stern legs longer than the forelegs. It had five toes
on each foot. The flat, triangular skull was thick, significance
the brain was quite small. Massive knobs and plates of bone, known as osteoderms, were embedded
in the skin of an ankylosaur, as in crocodiles, armadillos, and some lizards.
A tough, thorny layer of keratin probably overlay the bone.
Some of these
plates were urbanized in short spikes, others fused onto the skull forming
hornlets, and a few fused to the end of the tail to form the enormous
tail club. The tail was muscular, so it probably made an effective defensive
Ankylosaurus existed between 65 and 70 million years
ago, in the Maastrichian
age of the Late Cretaceous era, and was one of the last dinosaurs before
they were wiped out by the Cretaceous-Tertiary death event.
They were plant-eaters (herbivores). Being stiff and low-slung, they
must have grazed on low-lying plants.
Even giant carnivores of the Maastrichian, like Tyrannosaurus,Deinonychus, and Tarbosaurus,
almost certainly could not break through ankylosaur armor.
It is supposed they would lie flat on the ground, hiding
their soft abdomen from attackers. Like a porcupine, they
were only susceptible when flipped over, which was made
more difficult by the row of short spikes running down their
Classification and history of Ankylosaurus Dinosaur
Barnum Brown named the only species in the genera, Ankylosaurus
in 1908. Fossil remains have been found in Alberta, Canada, as well as
in Wyoming and Montana in the United States. Ankylosaurus is now housed at the Canadian Museum of Nature. Euoplocephalus was initially
believed to be an ankylosaur, but it now has its own genera.
The remains are fairly complete, including a couple skulls and the signature
tail. A track way of an ankylosaur was found in Sucre, Bolivia
in 1996, which showed that the massive dinosaur
could move quite quickly.
Etymology of Ankylosaurus Dinosaur
The name Ankylosaurus is resulting from the Greek agkylos, meaning "bent"
or "crooked", and sauros, meaning "lizard". This refers
to the way the bony plates on its back have complex with the thick skin,
and the way many of the internal supporting structures like the backbone
(vertebrae) and ribs have also fused together.
Ankylosaurus Dinosaur(armored dinosaurs )
30ft long and 4ft tall
The triangular skull of Ankylosaurus was covered with bony plates. It ended at a horny beak, which it used to crop vegetation.
Ankylosaurus Author:Daniel Cohen Publications:2003 Description:Provides information on the physical characteristics, behavior, habits, relatives, and predators of the dinosaur known as Ankylosaurus.
Ankylosaurus Author:Joanne Mattern Publications:2009 Description:Provides information about ankylosaurus, a heavily armored but slow-moving, plant-eating dinosaur.
Ankylosaurus Author:Rupert Matthews Publications:2004 Description:Describes about the size, behavior, and surroundings of the long-extinct dinosaur known as ankylosaurus.
Ankylosaurus Author:Michael Goecke Publications:2002 Description:Describes the physical characteristics and behavior of the armored dinosaur Ankylosaurus.