Weather in Xilong of Huzhou

Mamen dinosaur is a genus of dinosaurs. Living in the late Jurassic, it is widely distributed in East Asia. It belongs to the sauropod family. The weight can reach more than ten tons and the body length can reach more than twenty meters, but the neck accounts for half of the length. This is by far the longest-necked animal in the history of the earth. The first mamenxilong fossil was found in 1952, on the construction site next to mamenxi ferry in Yibin, Sichuan. However, due to the accent problem of the researcher, it was mistaken for Mamen Xilong. Photo reference: upload.wikimedia/ * * */Mons/thumb/4/48/sketch _ mammenchirus/200px-sketch _ mammenchirus Puzzled Dragon (scientific name Apatosaurus), formerly known as Lei Long, is a genus of Diptera, which lived in Jurassic about1400,000 years ago. They are one of the largest creatures on land, with a hip height of about 4.5 meters, a body length of about 2 1 meter and a weight of 35 metric tons. Their Greek name is "deceptive lizard" because its herringbone looks like a black dragon. The neck, spine and foot bones are bigger and heavier than those in Liang Long. People think it is a dinosaur with a long neck and a long tail, which is stronger than those in Liang Long. During normal exercise, the tail will leave the ground. The confusing dragon has a big paw on its forelimb. Its skull was first discovered in 1975, a century later than its name. Photo reference: upload.wikimedia/ * * */Mons/Thumb /3/3C/ Confused Dragon 2/ 180 px- Confused Dragon 2 It can be seen that Mamen Xilong has a longer neck than brontosaurus, but a bigger figure than brontosaurus. * * */w/index？ Title =% e9% 9b% B7% e9% be% 8d&; Variant =zh- zh. *** /w/index？ Title =% E9% A9% AC% E9% 97% A8% E6% BA% AA% E9% BE% 99&; Variant=zh- P.S: If you don't choose me, please let me know as soon as possible, so that the pass rate will not drop.

Mamenchisaurus, a super long-necked dinosaur "General Information" Height: 5 ~ 7m Body length: > 22m Weight: > Age of life: 20 metric tons: Late Jurassic: Age of life: 220 million years ago ~ 208 million years ago Found in China. Mamenxi in Sichuan is the most famous.

It is also distributed in central and southern China. Introduction before 1996

Before the discovery of feathered dinosaurs

If the most important archaeological discovery in China is to be said.

I believe I can't help but mention Mamen Xilong. Mamenxilong is the dinosaur with the longest neck so far.

The length of the car body is 22 meters.

but

Half of its body length has been occupied by a neck 1 1 meter long. The discovery of Mamenxilong greatly shocked the archaeological community.

Because the structure of Mamenxilong is not only related to the category of paleontology.

But also involves the theory of architectural design engineering. at that time

The dinosaur with the longest neck unearthed so far must be Liang Long; Even so.

Liang Long's neck is only a third of his body length. To support the neck 1 1 meter long.

Theoretically, the body length should be at least 30 meters.

Otherwise, it will cause uneven weight. however

The body design of Mamen Xilong can completely overcome the above problems. What is the practical use of neck length? One of them is the eating range: a long neck is not as convenient for dinosaurs as most people think. According to the computer model test of the skeleton structure of general sauropod dinosaurs

The neck, which accounts for more than one third of the body length, is only 20 (three-dimensional x

Y

Z axis). but

When eating with a long neck, the scope involved will be even greater.

in other words

Mamen Xilong just needs to shake his neck a little.

You can eat a large piece on the ground. A recent research report shows that most sauropods don't lift their heads into the air.

The ability to eat the leaves at the top of the trunk. thus it can be seen that

Most sauropods tend to eat low plants on the ground. Because it supports the neck of 1 1 meter, which accounts for half of the body length.

The cervical vertebra of Mamenxilong is different from that of most sauropods.

Its cervical vertebra has a long bony vertebra protruding outwards.

Direct fusion with the first few cervical vertebrae. This feature is not conducive to large-scale neck movement.

It shows that the neck activity of Mamenxilong was stiff 65.438+0.45 billion years ago. The body length over 22 meters is only 20 metric tons.

Can be "big but not stupid"

Simply because its bones are hollow. accidentally

Mamenxilong's teeth are fingernail-shaped, not "wedge-shaped" which is common in sauropods. Mamenxi dragon tail also accounts for another large part of its body.

Can wave the tail wing at supersonic speed (computer model test)

Release the energy of naval artillery.

Can be used for defense. The architectural design engineer said

The neck and tail of mamenxilong

Plus body parts

Just like a suspension bridge (Golden Gate Bridge, Tsing Ma Bridge). The spine is like a steel cable of a suspension bridge.

Play a role in supporting the neck and tail

Transfer weight to body parts

Feet and ground. Body parts are like bridge towers.

It plays the role of transferring weight to the ground. The suspension bridge model of Mamen Xilong is uneven.

Because its neck and tail are different in length.

Long neck and short tail. But with the present engineering technology,

It is very difficult to build a suspension bridge like Mamen Xilong. Sauropods devour pebbles to help digestion. Lei Long Lei Long/Puzzled Dragon "Overview" Height: 5m Length: 23 Weight: 35 Age: Late Jurassic: 213 million years ago ~144 million years ago Location: Colorado, Oklahoma, Utah and Wyoming, etc. Lei Long is one of the most well-known dinosaurs.

It was first discovered in 1877 during the "fossil war". Like most sauropods,

Lei Long's neck and tail make up most of his body.

The real "body" part only occupies a small volume. Its name "Lei Long" is named after its scale.

At that time, before archaeologists discovered bigger dinosaurs,

I believe that when Lei Long moves, it will make a loud noise like thunder.

Hence the name. Lei Long's limbs are like elephants today (much bigger, of course).

The area of the sole of the foot is about the size of a fully open umbrella. It has four toes.

There are big claws on it. Archaeologists know that the main foods in Lei Long are ferns and cycads.

They will swallow all the food.

Almost no need to chew. A group of huge Lei Long can destroy a forest in just a few days.

but

At that time, the main factory recovered quickly.

Giant sauropods have plenty of food and warm weather.

Breed rapidly in North America.

At the end of Jurassic, it became the mainstream species of herbivorous dinosaurs in North America. Lei Long was a typical herbivorous dinosaur in North America at the end of Jurassic.

It is 23 meters long.

26 ~ 35 metric tons. Because the second half of Lei Long's body is taller than the first half.

The hind legs are also stronger.

Archaeologists think they may be able to stand on their hind legs.

To make up for the lack of height. in addition

Some experts think they will lower their heads.

Low plants that feed on the ground. Lei Long is a social animal.

If people today are lucky enough to return to North America at that time.

You can see the spectacular sauropod dinosaur migration. The evidence that sauropods will make a great migration comes from the dinosaur footprints found today. A large group of Lei Long will inevitably destroy a large number of plants during the migration process.

A lot of dust was raised on the ancient North American grassland. We said before that they would swallow all the food.

There is almost no need to chew (you know, the fibers of ferns and cycads were very rough at that time.

Now herbivores don't eat it. therefore

How did Lei Long digest extremely thick fibers at that time? The answer comes from fossils that have been discovered. Archaeologists found some pebbles among the fossils in Lei Long.

This may explain how Lei Long digested extremely thick fibers. Just like birds today.

After Lei Long swallowed the food,

Will eat some pebbles

These pebbles play a role in grinding food in the stomach. I'm sure everyone has heard of the controversy over the naming of Lei Long.

The archaeological team first discovered Lei Long in 1877. At that time, it was named confusing dragon. 1883

In his published articles, Marsh first proposed the name Lei Long. By the beginning of the twentieth century,

The name "Lei Long" is generally accepted.

Soon became one of the most popular dinosaurs. but

Later, archaeologists discovered that the two dinosaurs were actually the same.

Due to the naming time problem

At present, the official name of Lei Long is Puzzled Dragon. but

Because Lei Long's name has been widely circulated.

So most people still use the name Lei Long. Lei Long means noisy dinosaur.

Confused dragon is a confused dinosaur.