What other dinosaurs do you know? Try to write the characteristics of this dinosaur.

Dinosaurs are diverse and dominant terrestrial vertebrates in Mesozoic. The word "dinosaur" is a biologist's translation of English Dinosauria, that is, "scary lizard", rather than "dragon" in China's traditional culture. Dinosaurs once ruled the global terrestrial ecosystem for more than 65.438+0.6 billion years. Dinosaurs first appeared in the late Triassic 230 million years ago and stood out in the Great Extinction. They died at the end of Cretaceous about 65 million years ago. The representative dinosaurs and some of their characteristics are listed below.

1 Triceratops

Triceratops is a kind of ceratosaurus. It has a horn on its nose, like a rhinoceros, and two horns on its eyes, like an ox. All three corners are 1 meter long, which is a powerful weapon for them to fight.

2 Lei Long

Lei Long is the largest dinosaur, some of which are more than 30 meters long and as high as six floors. Are herbivores or leaves. Most dinosaur fossils we see in museums are of this type.

3 Allosaurus

Allosaurus is a fierce and terrible carnivorous dinosaur. Its big mouth can swallow a pig at once. Its teeth are all bent inward, and its prey can't escape when bitten.

4 pterosaurs

Chiroptera lived in Cretaceous, and their bones were found in Europe. Pterosaur is not very big, its wings are only about 22 cm. But the wings of Fengshen Pterosaur were as long as 12 meters, which was as big as a bus. American scientists once found a pterosaur whose wings were more than 15 meters long. If we can see it today, maybe you will think it is a plane flying in the sky. Many flying birds and dragons are a bit like bats today. They seem to hold up huge wings with one hand, so having wings and claws has become a major feature of them. Some people think that later birds evolved from them.

5 double crown dragon:

Six meters long, with two protruding ridges on the top of his head, eating carrion. Short forelimbs, good at running. The carnivorous dinosaur in the early Jurassic was 6 meters long and its head was about 2.4 meters high when standing. It has two big bone crowns on its head, so it is named double-crowned dragon. Its nose is particularly narrow, soft and elastic. Those little lizards or other small animals can be picked out from bushes or cracks in rocks and eaten. Compared with the later large carnivorous dinosaurs, the double-crowned dinosaurs were "slim", so they acted quickly. Its mouth is full of teeth, and it can kill some large herbivorous dinosaurs. However, some scientists doubt its tooth function and say that it is just a dinosaur that eats carrion.

Spinosaurus (Latin name: Spinosourus, meaning "spiny lizard") is a kind of theropod dinosaur, which lived in Cretaceous (albion to early Sennorman) Africa, about 95 million to 93 million years ago. Spinosaurus is a grotesque carnivorous dinosaur, with a total length of 17 meters, a hip height of about 3.3 meters and a weight of 9 tons. Such a behemoth has hung a big earth sail on its back. This kind of sail is supported by a series of long spines, each of which grows straight from the spines, and it is impossible to fold or fold the sail at all. Scientists believe that Spinosaurus reached a record length of 17 meters, approaching many large herbivorous sauropods, and left other carnivorous dinosaurs far behind, becoming the largest land carnivorous dinosaur.

Spinosaurus has many protruding bones on its back, and the epidermis covers these bones, which looks like a sail raised by a ship. It has a big head and sharp teeth. Spinosaurus had smaller forearms than hind legs. Most of the time spinosaurus walked on two legs, and it could also walk on four legs; When running, it uses two legs. Spinosaurus had a big head. This is a clever dinosaur.