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Tuesday, September 16, 2014

Strange dinosaur with a form of half-duck, half-alligator

Spinosaurus is considered one fearsome worthy of the iconic dinosaur. Her body was larger than T. rex, as well as the other ancient carnivore animals.
Spinosaurus lived during the early-late Cretaceous, 100 million years ago. (Picture from: http://www.fanpop.com/)
Now, the scientists discovered something more amazing than this one creature: Spinosaurus Spinosaurus aegyptiacus type is the only dinosaur known to adapt to live almost entirely in the water. He also had a bony ridge on his back - similar to the screen - which is high above the size of an adult man.
Spinosaurus aegyptiacus, a strange dinosaur with a form of half-duck, half-alligator. (Picture from: http://bit.ly/Xa9zi3)
About 97 million years ago, in the river system in the region that is now the Africa, the giant Spinosaurus aegyptiacus splitting water, trapping fish through the conical teeth gap. Similarly, the scientists reported in the Science journal.

The latest fossils show, 15-meter long dinosaur that is physically adapted to life in water, including flat and probably webbed feet, also the location of the higher nostril in the head.

"These animals are very strange, which could force the dinosaur experts to rethink what they thought was already known," said Nizar Ibrahim, a vertebrate paleontologist at the University of Chicago, as quoted by LiveScience on Friday, September 12, 2014.

Spinosaurus is believed to be the first semi-aquatic dinosaur known. Spinosaurus was first described in 1915 by Ernst Stromer, a German paleontologist who discovered the remains of a number of these animals - including spine with almost 2.1 meters high in Egypt. Stomer create detailed illustrations and descriptions of the findings. However, in April 1944, his collection (including Spinosaurus fossil) were destroyed in the Allied aerial bombardment in Munich.

Afterwards, some people find Spinosaurus bone fragments, but not as complete of Stomer collections which have bombed. Finally, in April 2008, Nizar Ibrahim and his colleagues on the way home from the Kem Kem Beds site in Morocco, they stopped at a village in the desert where local residents often find fossils. That's where an ancient bone hunter approached, carrying a cardboard box containing a number of sediment and fossilized bones.

One of the bones caught the attention of Nizar Ibrahim. The shape is long and shaped like a knife - possibly the ribs. However, there is a mysterious red line crosses the bone. He guessed, it is a Spinosaurus bony.

Not long after, Nizar Ibrahim visited the Museo Civico di Storia Naturale in Milan, where the paleontologists in there who believed Spinosaurus fossils. In one of the bones, there is the same red line he had ever seen in a cardboard box in Morocco.

Unfortunately, researchers in Milan can not say where they found the fossils. Ibrahim also launched the "Mission Impossible" - back to Morocco looking for a man who carries the cardboard box. The problem: the only thing he knows about him is he has a mustache. Team diseparately looking that man. But could not find it. One day Nizar Ibrahim was sitting stunned in a cafe, drinking mint tea, musing on his mission that almost ended in failure, suddenly mustachioed man came over to his table.

With the mustache man's instructions, the researchers directed to the Spinosaurus site. In there, they found more bones from the same individual dinosaur. They then realized that the fossil oddity: very solid with no hollow medullary cavity of bones found in the arms and legs. Remains as it is often found in marine animals, which serves to control buoyancy.

The team then combines newly discovered bone with a picture made by ​​Stromer, also with some other similar fossils are stored in museums around the world. From the evidence of these bones leads to lifestyle in the water: like crocodile teeth are ideal for trapping prey in the water, the nostrils are located on the higher part of the head, a tail like a rudder flexible, short legs and big feet like paddles were allegedly webbed duck belongs.

The dinosaur had holes network and channels, called foramen at its muzzle, is identical to the structure of modern crocodiles - which are used to detect changes in water pressure caused the appearance of prey in the water.

Not only that, when analyzing its skeleton, the researchers found Spinosaurus aegyptiacus has a body structure tend to forward, suitable for living underwater.

"Anyone would not expect to meet with these animals on land, but he does not wander all over the landscape," said Paul Sereno, a vertebrate paleontologist at the University of Chicago.

The other Spinosaurus species are also known to eat fish, Sereno said, but Spinosaurus aegyptiacus is thought to be the only one who spent more time in the water. However, there are still big questions about Spinosaurus aegyptiacus i.e the bony ridge-like screen on its back. The researchers suspect, it functions as a marker, as it swam under water.

The researchers also very interested to learn more about how this Spinosaurus moving in the water. Sereno argued, most likely underwater propulsive energy that comes from the ancient animal legs and tail.

"It's a chimera.'s Half-duck, half-alligator. No comparison of modern animals that are similar to these dinosaurs," Sereno said. *** [EKA | FROM VARIOUS SOURCES | LIVESCIENCE]
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