PSITTACOSAURUS.


Somewhere in Asia where we now find Mongolia, 100 million years ago (Cretaceous) there was a genre of curious animal called a Psittacosaurus "parrot lizard".


A bipedal lizard 2 meters long, with special characteristics that made it look somewhat freaky. Its mouth was toothless in general, although some species did have small sharp teeth to devour the new flowering plants that appeared for the first time in mid-Cretaceous. Its mouth closed with a strong peak like that of a parrot and hence the name Lizard Papagayo. A peak bone, a protuberance of the skull finished with keratin (like rhino horn) that provided a hardened tip and sharp as that of a parrot.



The other peculiarity of this animal is that its tail and back were covered with tubular and hollow bristles. One thinks bristles served as a peacock tail.

Walking on two hind legs, had tubular and hollow bristles as protofeathers, the parrot-like beak and normal ... now would wonder if it was related to birds. And the answer is NO. In fact, and this certainly surprise you, is related to the Triceratops or Eotriceratops. (Ceratopsia)
Animals heavy, clumsy, weighing several tons and with horns, one, three or even five. But if you look at the representations that have been made in the fossils found, we see that these large animals ... also have beaks.

Albertosaurus.


I often think that the experts not too fussed for naming dinosaurs. For example, if they find a lizard in Alberta (a province of Canada), as they call Albertosaurus. Well, I'm no expert and I guess that is a valid way to classify other prehistoric animals.

And how was Albertosaurus? Well, this animal had many curious things. For example, Albertosaurus was a fearsome hunter, its bite while being less potent than the T.Rex, was very powerful, as well as the largest of the crocodiles, which are animals with bite even more powerful live.
We could say it was like a smaller version of Tyrannosaurus, but not that much less effective as a predator. Because when weighing 2 tons (nearly half of T. Rex), Albertosaurus could be quicker, faster and agile. An estimated could exceed 50 km / h (31 mi/h)... To get an idea, Usain Bolt (the fastest man in the world) reaches 37 km / h (22 mi/h).


The dimensions of this predator prehistoric were:

Weight: up to 2 tons (4400 lb).
Length: 10 meters (33 ft).
Skull: 1.2 meters (4 ft).
Height: 3.5 meters (10 ft).

As you see, it was so small, was a smaller version of T.Rex, and in fact, the only impediment to not become the apex predator of the late Cretaceous in North America, was this, that the T.Rex occupied that position.

Other characteristics of Albertosaurus was that had small arms, hardly useless.
Also had bony protrusions on the eyes which had the role of protecting the eye when producing its deadly bite.
And finally, have sharp teeth on the inside a form lumber, this allowed it to tear the flesh once bitten and pulled with his strong neck.
Albertosaurus really is the name of a genus and now consists of three species, but the most representative was Arctunguis Albertosaurus.
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