This post refers to the end of the Permian (250 million years ago), just as is produced the great extinction that wiped out 95% of life that lived the Earth.
We talked a little moment in the history of the Earth, but that influenced the species appear in the next million years. Let us see:
It is thought that the Permian extinction was caused by the continued and exaggerated emanations of lava and gases that literally suffocated the Planet. Some events that ended with the great synapsids that ruled the prehistoric Earth, and they were a kind of curious animals, with characteristics of mammals, but reptiles ... some are called "mammal-reptiles".
The peculiarity of these animals is that they were warm-blooded. And although in principle we think this is an advantage over cold-blooded animals, the truth is that at the decisive point of extinction, was a real problem. We must consider that for an animal to keep warm blood should eat up to 20 times more calories than a cold-blooded animal. A treat for a time when food was becoming scarce.
In a world dark and wounded animals that died were the first warm-blooded. Instead of cold-blooded animals could resist. Now when entrael Proterosuchus in history.
The importance of the survival of this genus (Proterosuchus) is that, because it, envolved all the dinosaurs and birds we know today. If Proterosuchus not have survived, probably we would not know either the T.Rex, or to Spinosaurio, or the Argentinosaurus.
And how was this prehistoric animal?
Well, to get an idea, the Proterosuchus was similar to a three-meter crocodile. Hunted in ambush near streams and lakes. Like crocodiles, his eyes on the top of his head to stalk their prey. The snout ending in hook.
Finally, gender is Proterosuchus in the history of evolution, an individual as important as what could be the Pikaia or Ichthyostega.