The main groups of reptiles, what are the main reptiles

The main groups of reptiles include reptiles, crocodiles, turtles, and snakes.

1.Reptiles: Include lizards, snakes, lizards, and lizards. Their bodies are usually relatively flat, with their limbs distributed on each side of their body. Snakes do not have limbs, so they need to move by twisting their bodies.

2.Crocodiles: Consists of animals such as crocodiles, crocodiles, and alligators, which live both in the water and on land. They have limbs and a tail that are covered with scales to protect themselves.

3.Turtles and turtles: including sea turtles, tortoises, and river turtles. They have limbs and a hard shell to protect themselves. Turtles and turtles can live like crocodiles in the water and on land.

4.Serpenta: including snakes, cobras, drill snakes, pythons, etc. Their bodies are very flexible and can move through very small spaces by twisting and squeezing their bodies.

The above are the main groups of reptiles, which you can learn more about as you need.

Reptiles are divided into four main groups: the subclass Voidless (or the Absent Bow subclass). There are no temporal orifar foramen on the side of the skull, including the order Cuposaurus and the order Turtles.

Subclass Inferior Hole (or Subclass Monoarcha). The skull has a lower temporal foramen on the lateral side, with the postorbital and squamous bones as its upper boundaries. Including Coiled Dragons and Beasts.

Modulated subclass (or broad bow subclass). The skull has an superior temporal foramen on the lateral side, with the postorbital and squamous bones as its lower boundaries. It mainly includes finnid dragons and ichthyosaurs, which are usually aquatic reptiles.

Diporondral subclass (or biarched subclass). There are two temporal and temporal foramen on the side of the skull, and the postorbital bone and squamous bone are located between the two holes, and this subclass is the dominant reptile, which is divided into the subclass Lepidsaurus and the Archaeosaurus subclass, including the archaeoptera, the beaked head, the scaly order, the alveolar order, the crocodile order, the sauropod, the ornithischian hip and the pterosaurus.

Breathe with lungs, have hard scales or nails on the surface of the body, fertilize in the body, oviparous, and have a hard egg shell outside the egg.

Reptiles include crocodiles, crocodiles, snakes, lizards, tortoises, turtles, beaked lizards, etc., with more than 8,000 species, which are divided into crocodiles, scales, turtles, and beaks. In addition to turtles, sea snakes, and water snakes, reptiles mainly live on land, and have three life rules: daytime activity, nocturnal activity, and morning and dusk activity, and need to rely on the outside world to absorb heat.

There are more than 8,000 species of reptiles, which are mainly divided into four orders: crocodiles, scales, turtles and turtles, and beaked lizards. There are 23 species of crocodiles, crocodiles, alligators, etc., nearly 7,900 species of snakes and lizards, about 300 species of tortoises and sea turtles, and 2 species of beaked lizards.

Most reptiles are cold-blooded and need to live in warm places, relying on the sun or geothermal heat for heating. They also live mainly on land, and only a few such as turtles, sea snakes, and water snakes live in the water.

There are three kinds of reptiles, which are active in the day, nocturnal and morning and dusk, which originate from amphibians, and are called amniotes together with birds and mammals, and reproduce by laying eggs and viviparity, and the embryo is protected by a multi-layer membrane.

Reptiles, like their ancestral amphibians, lack perfect insulation devices and body temperature regulation, and are prone to energy loss, so they need to absorb heat from the outside world and enter a state of hibernation in winter.

The reptiles that exist in the world are divided into these categories: the first group is the order Linda, which includes the earliest surviving reptile beak-headed lizard, as well as various snake lizards with the order Linda. Lizards include nearly 7,900 species of chameleons and geckos.

The second species is the turtle, which is also divided into nearly 300 species of amphibian reptiles such as turtles, soft-shelled turtles, king-eight sea turtles, and soft-shelled turtles.

The third category is crocodiles, reptiles, crocodiles. It includes Chinese alligators, Siamese crocodiles, bay crocodiles, Nile crocodiles, etc. Snakes, turtles, lizards, crocodiles, etc., which are commonly seen by people, are all reptiles.

Amphibians and reptiles are primitive terrestrial vertebrates. The first air-breathing terrestrial vertebrates, fossils suggest that they appeared in the late Devonian period, 360 million years ago. Evolved directly from fish, the appearance of these animals represents a transition from aquatic to terrestrial.

Amphibians have gills at the beginning of their life, which gradually evolve into lungs as they grow into adults.

Amniotia, which belongs to the tetrapoda, is a general term for all species of sauromorphs and zygomorphs except birds and mammals. In the process of the evolution of life, reptiles occupy an extremely important position.

Because its embryo can develop in amniotic eggs laid on land, its reproduction and development are free from dependence on the external water environment, and it is a true terrestrial vertebrate.

Snakes, turtles, lizards, crocodiles, etc., which are commonly seen by people, are all reptiles.