What are the prehistoric giant sharks that humans have explored so far?

Maybe you have watched Spielberg's "Jaws" in your childhood, and the appearance of the shark ** in it has left a strong impression on our childhood memories, so that we are even a little afraid when we think about it after a long time, but in fact, the shark in the movie is only one of many shark species. Sharks have existed for a very long time. You must know that the Jurassic era, which we remember as the existence of dinosaurs with a very long history, was the period when dinosaurs ruled the earth hundreds of millions of years ago.

But sharks are far older than dinosaurs, paleontologists have shown that sharks existed 500 million years ago, experienced countless geological changes, and emerged from many near-extinction disasters, it can be said that sharks are one of the evolutionarily successful species.

So what are the giant sharks from prehistory that we humans have explored so far, the earliest one that appeared in recorded history was the rift shark, the body of the rift shark is not like the current shark, spindle-shaped, but streamlined, the whole body is dark, and the mouth is huge after the mouth is opened. The teeth are also very distinctive, and the position of each tooth is arranged in several layers, which looks extremely **.

Later, there is the toothback shark, which is easily recognizable because it has a very conspicuous dorsal fin that resembles a tray. This shark first appeared in the Permian, that is, 300 million years ago, and the dorsal fin on its back was actually used to attract the attention of the opposite sex during courtship, but in the era of the toothback shark, the ocean was dominated by larger fish, and they were mostly prey in the mouths of other large fish. <>

Later, around 12 million years ago, the pinnacle of sharks, the megalodon, appeared. This shark can grow to weigh more than 70 tons, its body length can reach 20 meters, and even the food it eats is those large cetaceans, and the great white shark in the movie is only a quarter of its size.

The prehistoric giant shark that humans have explored so far is the tiger shark, which is a fierce shark that lives in the deep sea, and it feeds on all kinds of small fish in the sea to sustain its life.

It is recorded that the earliest prehistoric giant shark appeared was the rift shark, and the body of the slit shark did not look like the current shark, and then the toothed shark appeared, because there was a very conspicuous dorsal fin on the back that resembled a tray.

The earliest shark ever discovered was the Slit Shark, which was very different from the current sharks. It was larger than the current shark and was predominantly fusiformal.

In prehistoric times, there was a kind of shark that actually fed on whales, and it was the prehistoric giant shark - megalodon. Now let me show you what is so amazing about this shark. The largest shark in prehistory, the megalodon

Megalodon, also known as megalodon, is known as carcharodon megalodon, a Greek word meaning giant tooth. It is a huge prehistoric shark believed to have lived between 20 million and 12 million years ago. Fossil Tooth Megalodon is just a creature inferred from fossilized teeth and some vertebral fossils.

with Megalodon. Similar to other modern sharks, its bones are cartilage rather than bone, creating a lack of fossil bone records. However, the Megalodon's large hard enamel teeth, which are about 100 large, have been preserved for a long time. These teeth are similar to those of great white sharks and are about an inch long (maximum tilt length).

Recent studies have suggested that it is a close relative of the great white shark. However, this theory of inbreeding has been repeatedly questioned as the result of the similarity of teeth due to convergent evolution. In any case, this method of tooth inference allows us to know that this creature was a predator of gigantic size in prehistory.

It is estimated that the largest size of the megalodon is meters long. For this size, the Megalodon is estimated to weigh up to 60 tons. Assuming that the metabolism of the great white shark is proportional, it is estimated that it needs an average of 50 ths (2,400 pounds) of its body weight per day.

From the known prehistoric food chain, it is generally believed that it used whales as food. The average bite force is 28 tons, which is the maximum. In 1995, it was proposed to classify the megalodon into a new genus called Archaeosaurus.

So far, however, the issue of classification has not been resolved. Many paleontologists advocate classification as a genus of ancient sharks, while others with a background in marine biology insist on the relationship between megalodons and great white sharks, and instead classify them as genus Man-eating sharks. Scholars of the genus Archaeus believe that the ancestor of the megalodon is Otodus obliquus from the Eocene, and that the ancestor of the great white shark is Isurus hastilis.

Since the Megalodon mainly feeds on whales, the waters at the poles are too cold for Megalodon to survive, so the whales can escape from the Megalodon.

Caused the megalodon to become extinct due to lack of food. Other explanations point to the fact that any impact on the food chain will eliminate predators with huge metabolic demands. Others say that the megalodon is still not extinct and is still alive today.

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The discovery of a prehistoric giant shark 100 million years ago in our country is a surprising discovery and a great discovery. This species is slightly different from the age in which the great white shark lived.

Megalodon is a species of shark and is considered the largest shark and largest fish in history, and is currently extinct. Lai Yan headlines.

The megalodon is 2 to 4 times longer than the great white shark, and the great white shark and the megalodon are not at all in the same weight class and are not comparable to them.

China's first discovery of the giant shark petaltooth shark 100 million years ago, for us to engage in scientific research has played a certain role, is of historical value, it is essentially different from the great white shark, they do not belong to the same species, and they appear in different ages, so this giant shark is more epoch-making significance. This is a very important discovery and has great implications for paleontological research and biological evolution. It differs from the great white shark in that it has not yet fully evolved and is a transitional species.

The Institute of Paleospine of the Chinese Academy of Sciences and others discovered the prehistoric giant shark 100 million years ago - the petaltooth shark for the first time in the Yangquan area of Shanxi Province. This study enriches our understanding of the biodiversity of the Permian Urals in North China, greatly expands the paleogeographic range of the Vallodon shark in the Northern Hemisphere, and provides important fossil evidence for the migration of the Vallodon shark across the Paleo-Tethys Ocean, indicating that it has the ability to migrate across the ocean, further supporting that the Vallodon may be a very capable swimmer apex predator, rather than a benthic shellfish as previously thought. The research results were published in the form of a cover article in the international academic journal Acta Geologica Sinica on the 25th.

For the first discovery of the giant shark semi-tooth shark 100 million years ago is also a good spark, he played a certain role in our scientific research, it is fundamentally different from the great white shark, especially they do not belong to the same species, and they appear in different ages, so this giant shark is more epoch-making.

The discovery of the prehistoric giant shark valvetooth shark 100 million years ago in China is a very important discovery and of great significance for paleontological research and biological evolution. It differs from the great white shark in that it has not yet fully evolved and is a transitional species.

This discovery enriches our understanding of the biodiversity of the Permian Ural period in North China, expands the paleogeographic range of the vallodon shark in the Northern Hemisphere, and provides important fossil evidence for the migration of the vallodon shark across the Paleo-Tethys Ocean, which already has the ability to migrate across the ocean, further supporting the possibility that the valvetooth shark may be a very capable apex predator. The ecological niche of the valvetooth shark may resemble that of the modern great white shark, which was the apex predator of the Paleozoic oceans.

The valvetooth shark belongs to the cartilaginous fishes of the jawed class in the general classification, but it does not belong to either of the two major clades of living cartilaginous fishes, the plate-gill group and the holocephalic group, but belongs to the more primitive cartilaginous fishes, the eucartilaginous fish, which lived mainly in the Carboniferous to Permian periods. Because the bodies of cartilaginous fishes are mostly difficult to preserve, the fossils of valvetooth sharks found so far are all sporadic teeth. In terms of the size of their teeth, they are similar in size to the teeth of living great white sharks, and it can be assumed that the valvetooth shark is a prehistoric giant shark with a body length of between three and five meters.

The first discovery of the valvetooth shark 100 million years ago in China has very important significance and scientific value.

How to look at the difference between the prehistoric giant shark and the great white shark that was first discovered in China hundreds of millions of years ago, this must be different, his teeth are relatively large, suitable for the living environment at that time, the great white shark is more intimate, the smaller teeth are smaller, the megalodon is larger than the teeth.

China discovered for the first time 290 million years ago that the prehistoric giant shark was a tooth shark, and he and the great white shark should be of the same general lineage, and this fully shows that the ancestors of the great white shark are more distant.

This should be the first time in the history of our country to find such a giant shark, it and the great white shark should be the same root, the same ancestor, different body types.

In fact, about the first discovery of the prehistoric giant sequoia hundreds of millions of years ago, and then the tooth shark, he and the great white shark are really different, both of them are uh-huh, but to their different times, and there is their structure. Including other things, they are different in different living habits.

The valvetooth shark is a primitive cartilaginous fish that lived mainly in the Carboniferous to Permian periods (about 360 million to 250 million years ago), and in terms of tooth size, their teeth are similar in size to the teeth of living great white sharks, and it can be inferred that the valvetooth shark is a prehistoric giant shark with a body length of between three and five meters. As a worldwide genus, the fossil lobe shark is widely distributed in the northern hemisphere of England, Scotland, Ireland, Italy, Belgium, Russia, Slovenia and North America, but it has not been found in the southern hemisphere.

This kind of shark looks really strange, and the teeth of this shark are in a particularly cute shape, usually eating some creatures in the ocean, and then it looks stupid.

The body is very large, and the teeth are also very sharp, very **, and there are some similarities with the great white shark.

Does the absence of natural predators mean that there will be no extinction? First of all, this logic is wrong, the absence of natural enemies can only indicate that this creature is relatively strong or special, but the extinction of the species is not directly related to the existence of natural enemies.

Prehistoric creatures do have a relatively small number of natural enemies, such as dinosaurs, the overlords of the earth, they can rule the earth for millions of years, and there are no natural enemies, and the megalodon is the same, with such a huge size in the water and strong attack power, there are indeed no natural enemies.

But why is it extinct, dinosaurs are the same, so is the megalodon, everyone is also talking about the extinction of the dinosaurs, and the megalodon should be the same, in fact, it is not so much a natural predator, but the environment. The earth's environment may be the biggest threat to a race, for example, no matter how large the dinosaurs are and how strong their attack power is, but if they are affected by natural disasters, volcanic eruptions, lava flows, no grass, no food, no living space, they will definitely starve to death.

Similarly, the living environment of the megalodon is the same, the temperature of the sea water rises, the submarine volcano erupts, the marine life is gone, the megalodon has no food**, the food chain is broken, and it is naturally extinct.

So, it's not so much the natural predators that make the megalodon extinct, but the environmental factors that cause the food chain to fall off and perish.

The main prey of the megalodon is the small baleen whale, not the toothed whale and the large baleen whale, the former is too fast, the latter likes to go to the ice sea at the poles, but at the end of the Pliocene, the temperature and oxygen content of the sea changed, and the baleen whale began to gradually have a larger size, and the megalodon had no food.

The problem of sea water, the megalodon adapted to the temperature of the Pliocene, when the temperature was much higher than now, and if it gets cold all of a sudden, the oxygen content becomes low, like you throw a tropical fish in a goldfish bowl.

The most typical competitors are the Leviathan and Nagano whales, which have a high IQ that the megalodon does not have, and at the same time have a thicker fat layer to cope with the colder waters

Because the earth's environment has undergone some changes, because they have no natural predators, it will lead to a huge increase in numbers, and there is not much food to slowly become extinct.

Because the earth's environment is always changing, and they have experienced some extreme climates, it may be that they can't adapt to the climate and die.

Because the current environment is no longer suitable for the growth of this creature, it eventually perishes out naturally.

This is because you don't have the conditions to live in them, and it's actually because the air is getting thinner.