Showing posts with label Jurassic. Show all posts
Showing posts with label Jurassic. Show all posts


As its name suggests, (Camarasaurus) comes from camera .... but not the camera taking pictures. It refers to the camera as room as hollow, or internal and covered space. This refers to two bone peculiarities: the vertebrae, though robust, are quite hollow inside, and on the other hand, the skull was square and its huge nostrilsgiving the sense of having a very hollow or empty skull.

But what was a Camarasaurus?

It was a herbivore, a great vegetarian 18 meters long and 18 tons. It was a long sauropod like Diplodocus or Argentinosaurus. It was not as big as them, even for a sauropod, had a rather short neck and tail. However, the body was very strong, so experts estimate that could reach 18 tons.
It lived 150 million years ago in what is now North America.

Another curiosity is that when paleontologists mounted their bones, found a lump of hip bones. It has been speculated about this, and apparently could be that it was another brain, hip, not in the head ... I repeat: another brain in the hip. Finally, another brain or nerve plexus great about it .... still no full consensus.

The other curiosity we can emphasize is the domed shape of its skull. The experts believe that this will served as a sounding board to create a sound effect that could be used to communicate with other Camarasaurus. I imagine a Camarasaurus, warning of the attack by a group of Allosaurus, with a sort of nasal sound, similar to today's large ships when they enter port.
More things:

  • The Camarasaurus could not be applied on its hind legs.
  • Its front legs have claws capable of giving a good blow to their attackers.
  • Analyzed his teeth, thought to eat vegetables harder than Diplodocus.
  • It lived in the Jurassic.
  • To facilitate digestion, it could swallow stones, as is currently done some birds and other herbivores.


The epanterias Amplexus was probably the greatest of all Allosaurus. I say probably because many experts do not consider the rest found, the rest of a different species to allosauros. But this confusion is normal, the only bones that have been found are, 3 vertebrae a coracoid (a part of the body near the shoulder) and a metatarsal (a finger). Of these fossils, after analyzing the experts, it has concluded that they were Allosaurus, which were quite large, even more than the Saurophaganax or Allosaurus fragilis.

The epanterias Amplexus was a theropod (like almost all theropods, bipedal carnivores) allosaurid North America who lived around 150 million years ago ... in the Jurassic.

As to its dimensionsthe measures vary between 12 (39 ft) and 16 meters (52 ft.). Respectively, the first estimate corresponds to those who think that it was only a large Allosaurus fragilis. The measurements between 14 and 16 meters are estimates of those who believe that are treated rather of a different species.

Take for example the case of T. Rex. The Rex measures 12.5 (42 ft.)meters in length. Instead the epanterias Amplexus can reach 14 (45 ft.) meters according to some estimates, however, the most conservative support could reach 12 meters (39 ft.).

The height of one and the other is about 4 meters (13 ft.)high to the hips. If set upright likely it reaches 6 meters. And if we calculate the weight, this would approach between 4 and 5 tonnes (2250 lb.).
Only seeing the data we get an idea of their proportions. In fact, it is considered the longest of all allosáuridos, and larger and heavier than the Allosaurus fragilis ... if he really is a different species allosaurido.

If we saw to it quickly, clearly we would see the differences between epanterias Amplexus the T.Rex. For example, the first has smaller than the second head. Another characteristic feature is that the T.Rex has little arms, however the epanterias Amplexus has a longer and arms with huge claws.
If we had X-ray eyes, we would see that the T. Rex skull is more compact, its bite was stronger. Instead, the epanterias Amplexus had a lighter skull, but the top of his skull was secure with a powerful neck and would aim a bite with the upper teeth as an ax.

Among its favorite foods we would find Camptosaurus, Diplodocus and Stegosaurus ... of the greatest of all herbivores.


The size of a large dog, this therapsid (reptile-like mammals) was a terrifying predator of the prehistoric period. He lived in the Triassic and Lower Jurassic (made between 245 and 208 million years ago) in what is now South Africa, Argentina, China and Antarctica. It was one of the most impressive land predators of its time.
Praising Cynognathus fossilized skulls of openings have been observed at the height of the snout, typical skulls of mammals, where vessels and nerves pass supplying the whiskers, similar to cats and dogs. So you think you had hair, and that these particular should serve as sensory organs.
With almost two meters long (6.3 ft counting the tail) and a head of 30 cm (1.0 ft) with wide jaws and sharp teeth, its bite was strong and had to exert great pressure (similar to today's crocodiles with 2500 kg of pressure.
The Cynognathus was an agile runner and can reach a speed of 35 km / h. .. conclusion was a very effective and powerful carnivore.


These amazing animals are among the heaviest dinosaur that ever lived. Although his body resembled that of other sauropods, surpassed in size to most of its peers. It was about 25 times heavier than a giraffe long as three buses and as tall as a six-story building. Its neck and tail, incredibly long, were supported by a backbone like a grill. At the sides of the vertebrae, there were some openings that reduce weight without weakening his back. Most of the weight of its giant dinosaur bore members. Therefore, major bones were the blades, connecting the front legs with the body. The was large and strong, each of them would be higher than a soccer goal. His back was lower than their shoulders, as the hind legs were shorter than the front. When grazing among the plants and bushes, swinging his long neck in all directions. It could reach the juicy leaves of higher tops and low ferns. I needed lots of vegetation, cutting his teeth beveled. For easier digestion, probably swallowed small rocks that were deposited in your belly and helped to turn plants into pulp. Although hard to imagine, experts have suggested that brachiosaurids like this, roamed in herds slowly advancing. Surely the ground shake under their feet. The sheer size of an animal as this dinosaur probably deterred most predators living at the time. But if one is away from the bequest, was exposed to grave danger. On the inside of his legs, like those of elephants, had a sharp claw. With an accurate kick and a flick of its tail flexible, could bring down his enemy. Measuring up to 30 meters long and a little more than 15 high. It lived about 145 million years, at the end of the Jurassic period in North America.

Curious: There is another dinosaur called Ultrsaurus, but not the same, is smaller and fossils found in Asia.


Megalosaurus was a predator of some up to 10 meters long and weighing 1 t. He lived in what is now Europe, America, Asia and Africa during the Jurassic period, 181 made 169 million years.
Among their prizes were sauropods, large prehistoric animals and stegosaurs and mammals.
Besides being a fast predator, with speeds that could reach 40 km / h thanks to its well-balanced structure, the Megalosaurus also got their food scavenging.
The Megalosaurus was one of the first dinosaur discoveries, England 1818. At that time, and seeing the fossils found, these bones were so enormous that gave its name Megalosaurus (great lizard).
The jaw of Megalosaurus had teeth long and curved, strongly subject to the gums to avoid losing in the struggle. The teeth were sharp with the corrugated edge that worked like a saw. Ripping a more efficient prey.
To make matters worse, had prehistoric animal with sharp claws and tear that held the hard skin of the victims.


The Ceratosaurus had skulls with a structure similar to the dorsal horn on the snout, centrally placed in the nasal cast. They had fused sacral bones (Synsacrum) and the pelvic bones together and held together this structure. A row of small bony nodules or osteoderms were presented under the middle of the back.

The Ceratosaurus could have competed with Allosaurus and Torvosaurus for the same prey (giant sauropods Diplodocus, Apatosaurus and Camarasaurus), but this was smaller by about 6 to 8 meters in length, 2.5 in height, and weighing from 500 kg to 1 tonne would have an ecological niche occupied separately from their larger cousins. Moreover, the Ceratosaurus had a longer body and supple, with a tail shaped like a crocodile. This suggests that was a better swimmer and Torvosaurus Allosaurus. A recent study showed that Robert Bakker Ceratosaurus dams usually hunted waterfowl, such as fish and reptiles, but also had great potential to feed on dinosaurs. The study also indicates that adults and juveniles sometimes ate together. This evidence is, of course, very debatable and Ceratosaurus teeth marks are very common in large dams fossils of dinosaurs on land. Another common theory is that the Ceratosaurus has preyed primarily on Dryosaurus, Camptosaurus, and other ornithopods, since it seems a Lonely Hunter adults unable to break down sauropods. An alternative is that the ceratosaur eat carrion of large bodies of sauropods, displacing small small predators.

Ceratosaurus ("lagarto cornudo") que vivieron a finales del período Jurásico, hace aproximadamente 152 y 145 millones de años, en el Kimeridgiano y el Titoniano, en lo que hoy es Norteamérica, África y posiblemente en Europa.
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