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    - stegosaurus Stegosaurus was the largest member of the family of dinosaurs called stegosauridae. It was a four-legged and herbivorous dinosaur that lived during the Early Cretaceous period, about 140 million years ago. The stegosaurus was discovered in 1877 by Professor Othniel Marsh. When the specimen was discovered, he had large bony plates on its back, which reminded him of the tiles. This is how the stegosaurus received its name, meaning "roof lizard". Some of the bony plates had more than 3 feet tall, but it remains a mystery how the plates were placed on your body and how it used. There are different ideas in the scientific community use; some believe they may have helped the dinosaur thermoregulation. Another idea is that the plates of Stegosaurus helped him fend off attacks from predators on his back. It is speculated that these plates may have been brilliant decolores, and used to attract females. The stegosaurus was a large, heavy quadruped dinosaur, it was also slow moving. Instead of fleeing had to stay in one place and fend off predators. Your best defense was its powerful tail, which had a set of four bone at the end fence. Some species had two pairs of peaks, while others had four pairs. It is believed by some researchers that Stegosaurus was not able to coordinate a tail strike calculated, because his brain was very small. Perhaps the dinosaur was only able to twist the tail violently when an attack dinosaurs faced, as the Allosaurus. Statistics Stegosaurus Order Ornithischia Meaning of name: roofed lizard Period: Late Jurassic, 150 million years ago Location: North America Length: 20 feet (6.10 meters) Weight: 5.4 Tons Diet: Herbivore Time frame The stegosaurus lived during the Late Jurassic period, 150 million years ago. Late Jurassic fossil locations Stegosaurus fossils have been discovered in some parts of North America. Styracosaurio The styracosaurio or "spiked lizard" belonged to the family of dinosaurs called Ceratopsidae, which had horns and frills at the neck. Like other members of his family, Styracosaurio lived in herds, making their way through the dense forests that covered much of North America during the Late Cretaceous Period, 70 million years ago. The two main groups of ceratopsian dinosaurs were those with shorter flyers and those with long ruffles. The Styracosaurio belonged to the group of short wheel, but is most famous for his incredible driving. He had six main horns around the top of the wheel, and horns to nose. The wheel also had smaller at the sides of the steering wheel horns. The neck frill extending out from the rear plates dinosaur skull and skin had covered holes in it. This made driving much lighter than if it were solid bone. The styracosaurio may have used his flying to ward off attackers becoming larger than it actually was. When faced with a predator Styracosaurio straight, it would have looked like a difficult meal. The nose horn could have been used for defense against predators. The styracosaurio was discovered in the Red Deer River Valley in Alberta, Canada. It was the cemetery for several other dinosaurs too. From 1910 to 1917 several new types of dinosaurs in this place, including the dinosaur Corythosaurio, duck-billed and the tyrannosaur Albertosaurus were discovered. The Styracosaurio had an estimated length of 17 feet and weigh up to 3 tons. Statistics Styracosaurio Order Ornithischia Meaning of name: spiked lizard Period: Late Cretaceous, 75 -70000000 years Location: North America Length: 17 feet (5.18 meters) Weight: 3 Tons Diet: Herbivore Time frame The Styracosaurio lived during the Cretaceous period, 75 -70000000 years. Late Cretaceous fossil locations Styracosaurio fossils have been discovered in some parts of North America. Thescelosaurio The Thescelosaurio "Great Lizard", also known as Bugenasaura. It was a different dinosaur that lived during the Late Cretaceous Period, 70 to 65,000,000 years. The thescelosaurio had short legs and four toes. It is believed that this dinosaur was not a fast runner, due to their anatomical characteristics. This massive plant-eating dinosaur had ridges on their jaws, suggesting they may have had deep to the sides of his face, similar to those of mammals bags. Statistics Thescelosaurio Order Ornithischia Meaning of name: wonderful lizard Period: Late Cretaceous, 70 -65000000 years Location: North America Length: 8-12 feet (2.44 meters) Weight 450 a 650 lbs Diet: Herbivore Time frame The thescelosaurio lived during the Cretaceous period 70 -65000000 years. Late Cretaceous fossil locations Thescelosaurio fossils have been discovered in some parts of America Norte.Triceratops The triceratops "three facial horns" was a four-legged herbivorous dinosaur of the Cretaceous period, about 70 million years ago. The triceratops was first discovered in 1889 by a hunter of dinosaurs called Marsh. Many fossilized skulls have been discovered since then, and when viewed contain scars and damage somehow. It is possible that this damage was been caused by other predators, but it is also possible that the Triceratops to compete with each other. The triceratops was the largest and heaviest member of the family of dinosaurs called Ceratopsidae that dinosaurs were quadrupeds with sharp horns growing from his huge head. At ceratopsian dinosaurs they grew bone to protect them from attacks neck frills. The best weapons were his long Triceratops brow horns, which grew about 3 feet long. The third horn was placed towards the end of the nose and was thicker than the horns of the forehead. Triceratops was a strong contender against predators such as Albertosaurus and Tyrannosaurio. Because of its powerful neck muscles and powerful legs to push with their horns, Triceratops would have inflicted some serious damage to your attacker. Statistics Triceratops Order Ornithischia Meaning of name: Cara three horns Period: Late Cretaceous, 70 million years ago Location: North America Length: 30 feet (9.15 meters) Weight: 06.12 Tons Diet: Herbivore Time frame Triceratops lived during the Late Cretaceous Period, 70 million years ago. Late Cretaceous fossil locations Triceratops fossils have been discovered in some parts of North America. Troodon The troodon came from the family of dinosaurs called Sauronithididae, or "lizard-bird". It was a fast-moving dinosaur, agile, with excellent vision and a sickle-shaped claw on each foot, which were used to attack their prey. It is estimated that Troodon grew to a length of 7 feet and weighed 90 lbs. It was a relatively small dinosaur, but one of the smartest. When the researchers compared the brain size of Troodon to their body size, they found that had one of the largest brains among dinosaurs, suggesting that this dinosaur was very intelligent. But how the brain of Troodon had to really ?. It is believed to have been equal to a possum today. The troodon lived during the Cretaceous period, some 70 million years ago and roamed the lands of what is now North America. Fossil specimens have been discovered in Alberta, Canada. From this discovery in 1982, scientists discovered that Troodon had a bird-like basic physical structure. This suggests that small carnivorous dinosaurs and modern birds are closely related. Because Troodon had big eyes and excellent vision, you must have been able to hunt at night, possibly, a successful predator. The eyes of Troodon had about 2 inches in diameter, and may have had telescopic vision, which would have allowed detect prey easily. Statistics Troodon Order Saurischia Meaning of name: tooth to hurt Period: Late Cretaceous, 75 -65000000 years Location: Asia and North America's Length: 6 feet (1.83 meters) Weight: 14 lbs Diet: Carnivore Time frame The troodon lived during the Cretaceous period, 75 -65000000 years. Late Cretaceous fossil locations Troodon fossils have been discovered in parts of Asia and North America. Tyrannosaurio tyrannosaurio The Tyrannosaurio rex is perhaps one of the best known and one of the largest of all carnivorous dinosaurs. It lived during the Late Cretaceous Period, 70 million years ago. The tyrannosaurio rex was a fierce predator that walked on two powerful legs. This carnivore had a huge head with large, pointed replaceable and muscles well developed jaw teeth. He had small arms, each with two fingers. Each foot had three toes, all equipped with claws (plus a small spur vestigial fourth finger). The tyrannosaurio rex had a thin, rigid and pointed tail that provided balance and allowed the animal to make quick turns while running. The neck of this dinosaur was short and muscular. He was a heavily built, with a stiff, pointed tail, which used as a counterweight to its huge head theropod. The rear tail stiffened by interlocking of vertebral zygopophyses (bone structures which project forward and backward from the neural arches). The jaws of Tyrannosaurio were up to 4 feet (1.2 meters) long and had 50 to 60 thick, conical teeth, ranging in size from very small to more than 9 inches (23 cm) long. When teeth are broken, new growing to replace them. A Tyrannosaurio rex was found with some teeth up to 13 inches (33 cm) long. You could eat up to 500 pounds (230 kg) of meat and bones in one bite. The Tyrannosaurio rex had a scissors bite; when he closed his mouth, upper teeth of the lower jaw fit with the inside of the upper teeth. The tyrannosaurio rex was one of the largest land carnivores of all time. It was about 15 meters high and was about 40 feet long, with about six tons. Good Tyrannosaurio rex specimens, however, are hard to come by in Berkeley 90% of a skeleton was found, one of the best specimens found to date. Other samples are about 10% to 80% complete. Teeth Tyrannosaurio us were massive, like a railroad spike, were designed to crush bones and flesh. Its jaws were 16 times stronger than the current crocodile. His teeth were firmly anchored to withstand pressures from all directions during an attack. The Tyrannosaurio had an excellent view, support the theory that large visual lobes in his skull. The rex tyrannosaurio also had depth perception (as both eyes were positioned forward in the front of the skull). Predators have generally evolved depth perception to easily track their prey. The Tyrannosaurio rex had excellent olfactory receptors and was able to detect a possible food from afar. Like many modern predators in the wild such as lions, Tyrannosaurio rex probably did not eat every day, after killing an animal and was sated, this could support the dinosaur for a few days before returning to the search for a new massacre. Perhaps the Tyrannosaurio was also a scavenger, feeding on animals killed by other predators. Tyrannosaurio rex fossils have been found in western North America and Mongolia. Approximately 30 incomplete Tyrannosaurio rex specimens have been recovered. The first Tyrannosaurio rex was discovered by Barnum Brown in 1902 in Hell Creek, Montana, USA, North America. Statistics Tyrannosaurus rex Tyrannosaurus rex Order: Saurischia Meaning of name: tyrant lizard king Period: Late Cretaceous, 70 -65000000 years Location: North America Length: 40 feet (12.20 meters) Weight: 6-7 tons Diet: Carnivore Time frame The tyrannosaurio lived during the Cretaceous period, 70 -65000000 years. Late Cretaceous fossil locations Tyrannosaurio fossils have been discovered in some parts of North America.