Showing posts with label Velociraptor. Show all posts
Showing posts with label Velociraptor. Show all posts

The T.Rex had feathers?



Probably yes, especially when the animals were young. When the specimens were adults, the feathers have disappeared almost completely concentr√°dose in line, arm and other small areas of the back.


Experts think that T.Rex could have had feathers when they were young in order to stay warm, it would be a fine layer of downy feathers. When T.Rex reached adulthood, their sheer volume would keep the heat efficiently because, in general, bulkier bodies hold heat better. A large Tyrannosaurus certainly a feather cape hinder him when refrigerated ... especially in an era that was believed to be about 6 degrees higher than today. For example, the body of modern elephants generate a large amount of heat, if we add a warm climate, it is hard to imagine that dispense with an insulating layer (either feathers or hair).


Well, if I ever see Steven Spielberg will say that, apart from that the film should be called "Cretaceous Park" by T.Rex would be missing a few feathers.

But ... Why is thought to have feathers?

The fact attributed feathers T.Rex was not formed spontaneously when a paleontologist morning wake up ... no. The idea that the "Tyrant of the saurian" had feathers is suggested by the appearance of the remains of an ancestor, discovered this year in China, and notably had feathers. But not a few, was full of feathers. It was called "Yutyrannus Huali" or Yutyrannus whose name means "beautiful feather Tyrant."

Another example was the Dilong, a dinosaur discovered in 2004 that also keeps a relationship with the T.Rex (are of the same family). This was also covered with feathers.



The Tyrannosaurus, Velociraptor, the Dilong, the Yutyrannus, and many more ... apparently was more common than we think: prehistoric carnivorous dinosaurs had feathers.

Austroraptor

 




The Austroraptor is a close relative to Velociraptor, but larger, about 20 feet long (3 times longer). His name means "thief of the South" (South raptor), such as birds, and do not put this name by chance. In a way, his appearance might remind us old birds, a predecessor to the Raptors next we Know today. His head (over 4 fts) was low, long and streamlined, provided with numerous small and conical teeth. Moreover, according to the markings found in fossils, it was covered with feathers.

This prehistoric animal called attention to the paleontologist who discovered it to see how their upper limbs were in proportion smaller than others of the same gender: their short forearms depart from the condition characteristic of all long arms and their relatives dromaeosaurids avian nearby. This would therefore be a missing link between dinosaurs and modern birds.
  Perhaps (and this is my opinion) is an example of regression, this means that they resumed their oldest species characteristics. As is the case of flightless birds also reduce its wings.

Instead, it was her hind legs which facilitated the classification of this new species, the family Dromaeosauridae or "corridors lizards." By this I mean that was a fast runner Austroraptor, who had strong back legs and he used to hunt their prey.

The Austroraptor lived 70 million years in the late Cretaceous period in what is now South America..

Velociraptor.



To be a Velociraptor dromaeosaurid was relatively small, the adults reach a length of 2 m, and approximately 0.5 meters in height at the hip, and weighing about 15 kg. The skull, about 25 cm long, was uniquely up-curved, with a concave upper surface and a convex bottom. The jaws were lined with 26 or 28 teeth on each side, the rear edge of each tooth was markedly serrated.
But of all the features that made the Velociraptor a murderer efficient and sharp curved claws were the most dangerous. Located on the second toe of each foot, these claws were a fine point and were flattened laterally, like the claws of a cat. When the Velociraptor ran, stretched claws held back so as not touching the ground and did not lose their edge.
When the Velociraptor attack, the claw could project forward and down while HADB a strong kick. Thus, the claw could act as a razor-sharp knife and result in protracted and deep cuts in their prey, probably bleed to death.
Velociraptor is well known in his role as a cruel and cunning murderer may attack small offspring from larger dinosaurs such as Triceratops.

Velociraptor (meaning "swift thief") in Castilian Velociraptor, is a dromaeosaurid theropod dinosaur that lived during the Campanian to the late Cretaceous period, makes about 70 to 65 million years. On the mainland, which is in Europe and Asia.

Velociraptor



Velociraptor was a prehistoric animal measuring up to 2.07 m (6.8 ft) long, 0.5 m (1.6 ft) high at the hip, and weighing up to 15 kg (33 lb). The skull, which grew up to 25 cm (9.8 in) long, was uniquely up-curved, concave on the upper surface and convex on the lower. The jaws were lined with 26–28 widely spaced teeth on each side, each more strongly serrated on the back edge than the front—possibly an adaptation that improved its ability to catch and hold fast-moving prey.

Velociraptor, like other dromaeosaurids, had a large manus ('hand') with three strongly curved claws, which were similar in construction and flexibility to the wing bones of modern birds. The second digit was the longest of the three digits present, while the first was shortest. The structure of the carpal (wrist) bones prevented pronation of the wrist and forced the 'hands' to be held with the palmar surface facing inwards (medially), not downwards. However, whereas most theropods had feet with three digits contacting the ground, dromaeosaurids like Velociraptor walked on only their third and fourth digits. The second digit, for which Velociraptor is most famous, was highly modified and held retracted off of the ground. It bore a relatively large, sickle-shaped claw, typical of dromaeosaurid and troodontid dinosaurs. This enlarged claw, which could be over 6.5 cm (2.6 in) long around its outer edge, was most likely a predatory device used to tear into prey, possibly delivering a fatal blow.

Velociraptor (meaning 'swift seizer') is a genus of dromaeosaurid theropod dinosaur that existed approximately 75 to 71 mya (million years ago) during the later part of the Cretaceous Period. Only two species are currently recognized, although others have been assigned in the past. The type species is V. mongoliensis; fossils of this species have been discovered in both Inner and Outer Mongolia in central Asia. A second species, V. osmolskae, was named in 2008 for skull material from Inner Mongolia.

In 2007, paleontologists reported the discovery of quill knobs on a well-preserved Velociraptor mongoliensis forearm from Mongolia, confirming the presence of feathers in this species
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