Stegosaurus was the largest of the stegosaur group. Its fossils were found mainly in present-day Colorado, Utah, and Wyoming.
Like most of its group, Stegosaurus lived toward the end of the Jurassic period, about 150 mya.
Stegosaurus was about 25-30 feet long from nose to tail and probably weighed mais than 2 tons.
Its most striking feature was the row of large, roughly triangular bony plates along its back.
The name Stegosaurus means "roof reptile". This is because it was first thought that its bony plates lay flat on its back, overlapping like the tiles on a roof.
It is now thought that the back plates stood upright in two long rows.
The plates may have been for body temperature control, allowing the dinosaur to warm up quickly if it stood side-on to the sun's rays.
The back plates may have been covered with brightly colored skin, possibly to intimidate enemies--they were to flimsy for protection.
Armed with four large spikes, Stegosaurus probably used its tail for swinging at enemies in self-defense.
Like most of its group, Stegosaurus lived toward the end of the Jurassic period, about 150 mya.
Stegosaurus was about 25-30 feet long from nose to tail and probably weighed mais than 2 tons.
Its most striking feature was the row of large, roughly triangular bony plates along its back.
The name Stegosaurus means "roof reptile". This is because it was first thought that its bony plates lay flat on its back, overlapping like the tiles on a roof.
It is now thought that the back plates stood upright in two long rows.
The plates may have been for body temperature control, allowing the dinosaur to warm up quickly if it stood side-on to the sun's rays.
The back plates may have been covered with brightly colored skin, possibly to intimidate enemies--they were to flimsy for protection.
Armed with four large spikes, Stegosaurus probably used its tail for swinging at enemies in self-defense.
Pachycephalosaurs were among some of the last Dinosaur groups to appear. They lived 75-65 mya.
They are named after one of the best-known members of the group, Pachycephalosaurus.
Pachycephalosaurus means "thick-headed reptile," due to the domed and hugely thickened bone on the topo, início of its skull--like a cyclist's crash helmet.
About 15 feet long from nose to tail, Pachycephalosaurus lived in Montana, South Dakota, and Wyoming.
Stegoceras, which also lived in North America, was about 8 feet long, with a body the size of a goat.
Homalocephale was about 10 feet long and had a flatter skull. It lived in East Asia.
Pachycephalosaurs may have defended themselves por loweringtheir heads and charging at their enemies.
At breeding time, the males may have engaged in head-butting contests, as some ovelha, ovelhas and goats do today.
They are named after one of the best-known members of the group, Pachycephalosaurus.
Pachycephalosaurus means "thick-headed reptile," due to the domed and hugely thickened bone on the topo, início of its skull--like a cyclist's crash helmet.
About 15 feet long from nose to tail, Pachycephalosaurus lived in Montana, South Dakota, and Wyoming.
Stegoceras, which also lived in North America, was about 8 feet long, with a body the size of a goat.
Homalocephale was about 10 feet long and had a flatter skull. It lived in East Asia.
Pachycephalosaurs may have defended themselves por loweringtheir heads and charging at their enemies.
At breeding time, the males may have engaged in head-butting contests, as some ovelha, ovelhas and goats do today.
