What did an animal older than a dinosaur look like?

Introduction: Many people find it very strange to see dinosaurs, but there are animals that are earlier than dinosaurs. Many people don't know that netizens are also very concerned.

When they hear that there are animals that predate dinosaurs, most people are curious and want to know. Today, I'm going to tell you what animals that are older than dinosaurs look like. <>

The shell of this insect is particularly hard, and it is roughly equal in three places, so people will call it a trilobite, and they all live in the ocean. Trilobites survived for more than 300 million years throughout ancient times and made a deep impression on people, and they are almost impossible to see today. <>

Today I will tell you what are the characteristics of this pain, most of the shapes of this animal are oval, but the body and shape are very different. Some are so small that they can only be seen with a microscope, so this animal is relatively rare in ancient times, and many people are also very curious. The life of this animal is also very complicated, and its vitality is very tenacious.

What I want to tell you today is that we must protect animals, and animal life is also very fragile, although these rare animals may not be seen again. But in reality, we also have to be a person who protects animals. I often like animals very much, if I see a stray animal, I will definitely help it find a home, so that animals are also very happy and happy, they are the best friends of human beings, we must treat them well, so that we can form a good mode of getting along.

Although ancient animals may no longer be visible, in real life, we can still protect animals.

The horseshoe crab, which has been around since hundreds of millions of years ago to the present day, is known as a living fossil and is a creature that lives in the ocean, with blue blood and the ability to resist bacterial invasion.

Animals older than dinosaurs are terrifying, a bit like dragons, and a bit like phoenixes.

The horseshoe crab, this animal is a very old animal, it is very strange, like a stone, very ugly, a little similar to Wang Ba.

They should all look very strange, and they should all be some microorganisms, and they should all be things that grow in the water.

Animals older than the dinosaurs had a very large size and looked particularly frightening.

The first animals appeared 100 million years ago, the first vertebrates appeared 100 million years ago, the first jawed fishes appeared 400 million years ago, the first amniotic animals appeared 300 million years ago, the first dinosaurs and mammals appeared almost simultaneously 100 million years ago, what do you say about animals older than dinosaurs.

Different species of dinosaurs look different, as follows:

1. Long-necked dragon.

Typically 25 meters long, like other brachiosaurs, the forelimbs of the long-necked dragon are longer than the hind limbs, and the neck is raised high. The long-necked dragon had chiseled teeth, which were suitable for biting plants. Its skull has many large holes that reduce the weight of the skull.

Compared to its size, the long-necked dragon's head is much smaller, with teeth only about 300 cubic centimeters.

2. Tyrannosaurus rex.

Tyrannosaurus rex is the largest of the Tyrannosauridae family. The body length is about meters. The average hip height is about 4 meters.

The highest hip height can reach about meters, and the highest head height is nearly 6 meters. The average weight is about 9 tons, (the ecological average is about a ton), the heaviest tonnage, and the head length is about a meter. The bite force is generally 90,000 Newtons to 120,000 Newtons, and the maximum end of the mouth can reach about 200,000 Newtons, and it is also the thickest carnivorous dinosaur.

3. Pterodactyl. <>

Pterodactyls were the first vertebrates to fly, and the wings of pterosaurs were derived from the membrane located between the sides of the body and the four wing phalanges. Earlier species had long, toothy jaws, and long tails; Later species have significantly shortened tails and lack teeth.

4. Triceratops.

Triceratops was a medium-sized, four-legged dinosaur with a total length of 7-9 meters, a height of meters, and a weight of tons. They have a very large head shield, as well as three horns, reminiscent of modern rhinoceros. They are famous for the large number of specimens of partial skeletons found from 1887 onwards.

For a long time, there was a debate about the function of their three horns and the head shield.

5. Heterodontosaurus.

The most distinctive feature of Heterodontosaurus is the tall dorsal sail on its back, which is also characteristic of certain discoid species (Gyrosaurus, Ianthesaurus, Cuneidontosaurus). The sail may be used to control body temperature, and the surface of the back sail allows for more efficient heating and cooling. This temperature regulation is important because it gives it more time to hunt prey.

Because he is the only dinosaur, and as early as hundreds of millions of years ago, many dinosaurs were reproduced, and dinosaurs slowly evolved and slowly changed.

The reason for the huge size of prehistoric organisms was determined by the climate and the oxygen content of the atmosphere at that time, and of course, they adapted to the environment.

A long, long time ago, about 200 million to 70 million years from today, there lived a huge family on our earth, which ruled the sea, land and sky, and no other animal could compete with them, they were veritable overlords, and this was the dinosaurs.

At that time, the climate of the earth was warm and humid, and the forest was full of dense forests, and the forests were inhabited by a variety of animals, so both plants and animals-eating dinosaurs had endless delicacies. Because of such a good environment, dinosaurs are generally huge.

Because even among the extant animals there are large animals, and even some animals are no smaller than the dinosaurs. However, from a macro point of view, it is true that the average size of animals is now a bit smaller than that of dinosaurs. So, what are the animals that are close in size to dinosaurs?

And what causes this? Let's take a look. First of all, let's be clear, dinosaurs also come in size.

For example, the smallest dinosaur is only about 1 meter long and weighs less than 3 kilograms, while the largest dinosaur ** dragon can be 40 meters long and weighs nearly 100 tons. Judging from the dinosaur fossils that have been discovered, the earliest dinosaur was Archaeopteracian that lived in the middle of the Triassic period (about 100 million years ago), and its body length was only about one meter. Why did the flora and fauna grow so big at that time?

What are the flora and fauna that big now?

First of all, the climate and ecological environment at that time were good. In most of the era when the dinosaur family survived, the ecological environment of the earth was very good, especially in the Cretaceous period, which can be said to be much better than the current ecological environment of the earth, when the climate on the earth was relatively warm and humid, the plants grew lush and verdant, and the good rainfall and light conditions allowed the plants to grow very large, and because of the abundance of food, the animals were not afraid of nutritional deficiencies.

Whether it's a herbivore or a carnivore, there is no shortage of food**, so animals can grow very big, and of course the habitat of animals on Earth is larger than it is now. An efficient respiratory system may be one of the reasons for the enlargement of dinosaurs We know that dinosaurs are not extinct, and that today's birds are the descendants of dinosaurs, and the poultry we often eat, domestic chickens, belongs to a class of theropod dinosaurs.

If the oxygen level is high, the vertebrate animals like dinosaurs are larger, so why don't we raise chickens in an aerobic environment? Birds spread through their body's air sacs, absorbing and exhaling air, allowing it to pass back and forth through its lungs twice. This respiratory system is more efficient than that of mammals, such as humans.

In addition, this breathing style can also adjust the breathing efficiency relatively actively according to environmental changes, and make better use of oxygen in the environment.

To say a very simple example, the eagles on the plateau can fly at high altitudes with very thin oxygen and nest in the mountains at high altitudes, which shows that their breathing efficiency is very high, so that the low oxygen environment will not affect their size. Our own genes are different! The genes of prehistoric dinosaurs were not as complete as they are now, and the animals of the dinosaur era lacked reproductive genes in their bodies that inhibit cell growth.

Many creatures in ancient times did not have this gene, so their size increased uncontrollably, and the current blue whale does not have this gene. Just like the current crocodiles and dinosaurs belong to the same era, as long as the crocodile does not die, the body cells have been growing, but because of various factors such as temperature, oxygen content, etc., the crocodile is not as big as prehistoric.

I think there are a lot of factors, first of all, there are no very large animals for the dinosaurs to feed on, and secondly, the changes in the surrounding environment, such as temperature and humidity, are no longer suitable for their living environment.

Due to the lack of resources to grow into huge sizes, the constraints of natural predators, and the lack of genes to carry huge species, the current land animals are not as big as dinosaurs

Because of the lack of resources to become large animals, the existing resources are not enough for animals to grow. Large animal genes are also missing.

1.Amphibian.

2.Reptiles.

Correct answer: Reptiles.

The discovery of dinosaur fossils has a long history. Long before the discovery of the avian dragon by the Mantels, Europeans knew that there were many huge fossilized bones buried in the ground. However, at the time, people did not know their exact attribution, so they were always mistaken for "the remains of giants".

It wasn't until the Mantels discovered the avian dragon and compared it to the iguana that the scientific community tentatively determined that it was a long-extinct reptile similar to the lizard's fluid.

What are the habits of dinosaurs:

Dinosaurs had two habits: foraging for food and fighting.

1. Foraging. Herbivorous dinosaurs were limited by their height in the plants they could eat, so some small herbivorous dinosaurs would stand on their hind legs in order to eat the leaves of plants at high heights. Carnivorous dinosaurs fed on herbivorous dinosaurs and other animals.

The different foraging patterns of various dinosaurs are also reflected in their teeth.

2. Struggle. Sharp teeth and claws were preyed upon by carnivorous dinosaurs. Tyrannosaurus dinosaurs often went it alone because they sought out lone herbivorous dinosaurs.

Some dinosaurs would move in groups, locking on to their prey and swarming and slicing open the prey's belly with the claws of their second toe.

Herbivorous dinosaurs generally had some special "equipment" to deal with the attacks of carnivorous dinosaurs, which sometimes consisted of tough leather armor, bone clubs, or bone spikes, and sometimes powerful tails. Such as mallet dragon and so on. Large herbivorous dinosaurs would act in groups, and when threatened, they would collectively hold their ground and fight back.