The study on the evolution of these wonderful prehistoric animals has allowed us to classify them by their type of food, habitat in which they lived and locomotion (pelvic structure). Some prehistoric saurians evolved and became new species, but other dinosaurs disappeared due to various factors, mainly environmental. Types of dinosaurs and all their classificationsįrom the moment dinosaurs appeared on earth, the evolution of their different species has left the mark of a multitude of different genera and species on the planet. Adamantisaurus - This titanosaur was named 50 years after its discovery. Acrotholus - North Americas earliest bone-headed dinosaur. Others were the size of a chicken and weighed as little as 8 pounds. Acrocanthosaurus - The largest meat-eating dinosaur of the early Cretaceous period. Some weighed as much as 80 tons and were more than 120 feet long. Although, we would like to clarify that many researchers claim that between 700 and 900 new types of dinosaurs could be missing. Non-avian dinosaurs (all dinosaurs besides birds), which are now extinct, varied greatly in shape and size.
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