What species is the ancestor of the tortoise? Why didn t the turtle evolve in terms of speed?

What species is the ancestor of the tortoise? Why didn't the turtle evolve in terms of speed? Turtles are probably the most defensible animals in the world today, and with their thick and sturdy back armor, few animals in nature can easily break through defenses.

But have you ever wondered what kind of creature the turtle evolved from? There are also many unsolved mysteries about this kind of slow-moving, inherently affordable housing, and long-lived creatures.

Before the Permian, there were no turtles on the earth, and after the Permian, the earth slowly evolved turtle subclass organisms. Modern scientists, through the study of paleontological fossils, believe that the ancestor of the turtle is likely to be Siberian Ssaurus, which lived about 260 million years ago. Because the Siberian dragon has too many attributes that are consistent with the turtle and turtle subclass.

For example, the dragon is also a reptilian with a solid thick skin, a hard back covered like a tortoise shell, a water preference, and a slow move. All of this is very similar to today's turtle subclass creatures, especially large tortoises. However, paleontologists have not found fossilized eggs of Ssaurs, so it is impossible to prove whether they are oviparous or not.

However, although it is speculated that Siberian dragons are the ancestors of turtles, there are still big differences between the two. First of all, the Siberian dragon was so large that it almost rivaled that of later dinosaurs. Paleontologists speculate that an adult Siberian dragon could weigh more than 5 tons, almost like a heavy tank!

As a comparison, the Galapagos tortoise, the most continental tortoise on the planet, weighs only about five or six hundred catties, which is only about one-twentieth of the Siberian dragon. The only one in history that can be close to the size of the Siberian dragon is the Cretaceous period of the ancient giant tortoise, this turtle creature can reach a body length of more than 4 meters, the distance between flippers can be close to 5 meters, and the weight is about a ton. Despite their extremely large size, Siberian dragons are herbivorous and barely eat meat.

During the highly competitive Permian period, such a large size would have kept them safe from most creatures, but it was impossible to escape the minions of the Permian overlord Liodontid.

Due to its large size and resemblance to a mountain of moving meat, Siberian Dragons have become a favorite target for Toothmons. And in the face of the sharp minions of the lidont, the solid defense of the Siberian dragon is meaningless. The Rodonts will seek out their weakest points and dismember the "mountain of meat" step by step.

The Siberian dragons, poisoned by the Lidont, did not change the direction of their evolution. They remain steadfast in their evolution towards "passive defense" and have evolved a more complete set of armor. Today, the Lycodon is long gone, but the descendants of the Siberian Dragons are still thriving.

The ancestor of the turtle is also a turtle animal, probably close to the crocodile, the turtle is a very long-lived animal, it does not evolve in terms of speed because it does not lack food, it eats a lot of food and a small amount.

The turtle evolved from the dragon, but the dragon is very large, but it still has natural predators, and in order to protect itself, it slowly grows a hard shell.

It's still like a turtle, and it hasn't changed much, it's just bigger, and his body is too heavy to evolve in terms of speed.

We often say that the king of a thousand years is eight, and the turtle of ten thousand years. In fact, this sentence also describes the long life of turtles. Many animals in this world have evolved, for example, snakes in the past had legs, and in order to adapt to later life, they gradually degenerated their feet.

I have to say that all creatures in the world are very smart, and in order to adapt to the new environment, they gradually evolve and eliminate their own shortcomings. There are many organisms that became extinct 10,000 years ago, and we can only study them through fossils. However, there is still a common animal genealogy, which is very troublesome for scientists.

The animal is a tortoise, and scientists have no way of determining who the tortoise's ancestors were. Why is it so hard to tell? Today, I will take you to answer your questions.

There was a paleontocrat 100 million years ago, and now scientists named it the male turtle, although the name has a turtle, but the physical appearance is not at all the same as the turtle we know. The southern turtle is a cereal reptile and is very good at digging, but later in order to adapt to survive. The broad ribs evolved to become thicker, and then through evolution, the clavicle also closed, forming a structure of the tortoise's abdominal carapace, which is now called the progenitor turtle.

Later, the ancestral turtle evolved to have the first complete abdominal carapace, and the creature that only had the abdominal carapace was called a semi-carapace. But nowadays tortoises have no teeth, and semi-carapace-toothed tortoises have teeth. The semi-carapace-toothed turtle then evolved to completely merge the spine and ribs to form our common turtle shell.

Now both foreign and domestic biologists feel that turtles and crocodile birds have a common ancestor. The problem is even more complicated, because the ancestors of crocodiles and birds did not separate hundreds of millions of years ago, and the masao turtle still existed at that time. If crocodiles, birds, and tortoises have a common ancestor, then the southern tortoise has nothing to do with the tortoise we know now.

That's why scientists have a headache and have not been able to find the tortoise's ancestors.

Scientists are still unable to determine whether the tortoise evolved or not, because it is not yet possible to determine the ancestor of the tortoise, and it is rumored that the ancestor of the tortoise was the Hebi Cup. However, there is no strong evidence that the tortoises were evolutionary, and there is no evidence that the cup dragons were the ancestors of the tortoises.

I believe that the turtle did not evolve, because the turtle has a particularly long lifespan, and it is possible that it has slowly reproduced from the beginning and has not undergone corresponding evolution.

The tortoise does not change, the tortoise's lifespan is particularly long, and it is very likely that it has not been purified in the belt for tens of millions of years, but has been multiplying.

Turtles may not have evolved, turtles have a particularly long lifespan, and may have multiplied slowly and have not evolved.

The ancestor of the turtle is the protojawed turtle. The protojawed turtle, also known as the Triassic Turtle, is the original ancestor of the turtle animal, and its appearance is similar to that of the living turtles. The protojawed turtle is the common ancestor of the living turtle and turtle, except for the primitive features such as the head can not be retracted into the shell, it is not much different from the modern turtle, its teeth have disappeared, the two jaws also form beaks, and the body is protected by a turtle shell.

Native to Germany, the protojaw turtle was also found in northern Thailand between 1980 and 1981, and has not yet been found in China. Protojaw turtles are larger, their teeth have disappeared, their jaws have formed beaks, their bodies are protected by hard tortoise shells, and the back of the tortoise shells has spines, but their heads cannot be retracted into the shell.

Protojawed turtles belong to the suborder Protojawed turtles in terms of classification and phylogeny, and the amphibian turtle suborders that appeared after them were widely distributed in the Mesozoic and continued until the Cenozoic. In the late Mesozoic era, the suborder Side-necked Turtle and the Suborder Curved Neck Turtle were differentiated from the amphibian turtle suborder.

Turtles are half-water, half-inhabited, half-terrestrial reptiles. It mainly inhabits rivers, lakes, reservoirs, ponds and other waters. During the day, they often sink in water.

When summer is hot, they look for shade in groups. They have a gentle temperament and do not bite each other. When encountering predators or being frightened, they shrink their heads, limbs, and tails into their shells.

The ancestor of the turtle is the protojawed turtle. According to the evolutionary classification, the turtle is differentiated from the cup dragon animal, and the earliest turtle fossil found so far is the protojawed turtle born 200 million years ago, so the ancestors of most turtles and turtles are protojawed turtles. Protojawed turtles, on the other hand, have hard dorsal carapaces, but they are unable to shrink their bodies into their shells.

The ancestor of the turtle is the protojawed turtle. According to the evolutionary classification, the turtle is differentiated from the cup dragon animal, and the earliest turtle fossil found so far is the protojawed turtle born 200 million years ago, so the ancestors of most turtles and turtles are protojawed turtles. Protojawed turtles, on the other hand, have hard dorsal carapaces, but they are unable to shrink their bodies into their shells.

The ancestors of turtles were also turtles.

The origin of turtles and turtles is still unclear (October 2019), and the existing theories about the evolutionary and systematic relationship of turtles and turtles are mainly based on morphological studies. The earliest fossil is a Permian ancient turtle from the Permian period of South Africa, which already had a bony shell.

The triassic turtle and the primitive turtle have also become turtle shapes. However, the three are different and by no means the same source. The South South African Permian turtle has thick ribs, irregular skull, and toothed palate, and is generally inferred to be close to a branch of the broad-toothed lizard suborder of the order Cuplizard.

During the Jurassic, there were two suborders of amphibian turtles and side-necked turtles in Sichuan Province, China.

Turtle Habits:

Turtles are ectotherms, unable to maintain a constant body temperature, largely affected by the ambient temperature, and the ambient temperature is too low or too high. Turtles are dormant during both the harsh winter months and the hot summer months, which is called hibernation and summer hibernation.

The turtle has a strong ability to withstand hunger and thirst, and it is okay not to feed it for ten days and a half months, but the time should not be too long. Of course, there are also those who do not eat for several years and do not die.

When the turtle encounters an external impact or an attack by an enemy, it will quickly retract its head, tail, and limbs into the hard shell to avoid injury. Terrestrial turtles can crawl on land and can withstand a lot of pressure. Semi-aquatic turtles can crawl on land, have webbed fingers and swim in water.

Aquatic turtles are streamlined and have paddle-shaped limbs that allow them to swim in the water.