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Introduction of Dinosaur Fossils And Their Ancestors Specific Presentations and Interesting Facts of Brachiosaurus

Where Did Early Dinosaurs Come From And How Did They Evolve

Aug. 31, 2021


Dinosaurs are one of the most successful groups of animals to roam the earth. For more than 170 million years, they ruled the land, from tiny creatures just a few feet long to some of the largest animals to ever walk the earth.

Now we learn their appearance through dinosaur costumes and animatronic dragons. But despite their long evolutionary history, the origins of dinosaurs remain shrouded in mystery.


Velociraptor Costume(DC-61)


What are dinosaurs?


Dinosaurs belonged to a group of animals known as the main dragons.

Today, this group is represented by birds and crocodiles. In the past, it was more diverse, as it also included all extinct dinosaurs, pterosaurs and many odd-looking crocodile ancestors.  

There are many different features that define dinosaurs, but perhaps the clearest thing is the modification of the hips and legs. In particular, they created a stronger connection between the hips and the spine, called the sacrum. This feature was so unique that the founder of the Dinosaur Museum used it when he first defined dinosaurs, noting that extinct avian and megalodon dinosaurs had a sacrum consisting of five fused vertebrae. 

While crocodiles and lizards had legs that stuck out from their bodies at right angles, to become bipedal, dinosaurs had to tuck them directly underneath their bodies. This means they had to modify the top of the hip and vertebral joints, where the thigh bone meets the hip. In short, all of these features helped define dinosaurs.



What did the earliest dinosaurs look like?


The earliest final dinosaurs were not one animal, but an entire ecosystem containing several different species. There is no universally accepted species of dinosaur that lived much earlier.

Dating back to the Late Triassic, about 230 million years ago, the Izquigualasto Formation of Argentina contains a series of animal remains. It shows that the environment was dominated by early reptiles known as snub-nosed dinosaurs, as well as animals closely related to the origin of mammals called cynodonts.

Crucially, however, it reveals that there were many different early dinosaur species in the mix. These include small bipedal animals such as Herrerasaurus, which dates back to about 230 million years ago and is one of the oldest final dinosaurs .


Brachiosaurus(AD-1146)


Finding the first dinosaur


The closest relatives to dinosaurs have been identified only in the last two decades. They are called silesaurids - medium-sized tetrapods that look like tall, long-legged lizards, just outside the dinosaur door. There's also little left of the genus Nyasaurus, but what also suggests it may have been one of the first dinosaurs.  

Because of the fragmentary nature of the fossil, it is difficult to determine if it is a true dinosaur. Either way, it is thought to be very close to their origin. Nyasasaurus is the only animal that has been tentatively placed in this gap because it comes from the same age as the earliest silesauurs, so this could mean that it is the earliest dinosaur.


Regardless of the state of Nyasasaurus, a good indication of what the first dinosaurs looked like can be obtained by drawing from the evidence provided by the earliest true dinosaurs.

They were most likely small, active predators. Starting out with a body length that was probably only a few meters, they would have walked bipedally and had small hands that grasped things. They are relatively uncommon because even if you get the first identified dinosaur about 230 million years ago, they are still a rare member of the fauna.

It wasn't until the late Triassic extinction event that occurred 201 million years ago that dinosaurs finally got a chance to survive. The mass extinction wiped out almost all other competing sauropods, which meant that the environment offered dinosaurs a wide berth. During the Jurassic and Cretaceous periods, dinosaurs took full advantage of this and evolved into an incredible array of creatures. 


For more intersting knowledge about dinosaurs and dragons, please follow GENGU, we have animatronic dinosaurs and other puppets for sale. You will find a wonderful new world.

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