EVOLUTION OF SEA REPTILES

EVOLUTION OF SEA REPTILES

-250 million years:The mother of extinctions,the Permian extinction, the most catastrophic extinction in the history of the planet.Some animals hide in burrows,others climb mountains,but we will see the reptiles that go in the water.They swam for some 2 million generations and then is the end of the extinction.-230 million years:But after 2 million generations of swimming they have scaly membranes between their fingers.Tanystropheus is 6m long and have a record,the longest neck for his body size.Nothosaur is the top predator of this oceans.Ichthyosaurs,like Cymbospondylus,Shoniaurus and Mixosaurus are demanded  the seas,using their tales like a fish to move in the water.-160 million years:Now the ichthyosaurs exists but they don’t rule,a new kind of marine reptiles has arrived,the plesiosaurs,Kimmerosaurus,Elasmosaurus and Styxosaurus are the new kings of the seas,they use their 4 flippers to ‘’fly’’into the water.-90 million years:The ichthyosaurs are all extinct,the plesiosaurs live,but the kings are mosasaurs.They moved and ate like a snake 4 small hand like fins and a super long tale.-65,5 million years:The mosasaurs are still the kings and plesiosaurs exist,but then a great cataclysm from out of space is coming,an asteroid 12 miles across slammed in to Earth and march the end of the age of sea,flying and land reptiles.In their shadows the sharks survived and became once again after 165 million years the kings of the seas,until today.