What are the characteristics of salamanders? What are the species of salamanders What are the specie

<> Salamanders Salamanders have a long tail and they all have poor eyesight, so they only eat live bait when hunting. Adult salamanders are about 61 to 155 mm in length. Their ** is relatively smooth, with small warts, and weak ridges.

The salamander consists of 5 parts: head, neck, trunk, limbs, and tail. The head of the salamander is flattened, the tongue is small, thick, oval, the anterior and posterior ends are connected to the mucosa of the bottom of the oral cavity, the limbs are weak, and the fingers and toes are webbed; The caudal pole is flattened laterally. males have anal hypertrophy and large anal fissures; The female anus is mound-like and has a short anal fissure.

The neck of the salamander is not obvious, the trunk is flattened, the limbs are more developed, the forelimbs are four fingers, the hindlimbs are five toes, the fingers (toes) are not webbed, and the tail side is flat and long.

The vomer teeth of the salamander are "", the labial fold is more prominent, the premaxilla is 1, and there is no bone suture in the middle of the nasal process; The maxillary and pterygoid bones are both short and far apart. The basal lingual cartilage has one pair of digital processes, two pairs of angular gill bones are ossified or only one pair of ossification, and the upper branchial bone is only one pair. Juveniles have balanced branches, 3 pairs of outer gills, pinnae; The caudal dorsal fin fold originates from the anterior part of the body, and the fin fold is low and straight.

Salamanders are short, have 4 legs, are damp, and mostly have bright colors and conspicuous appearances. The overlord salamander is the largest, with a body length of up to one meter.

Axolotls all have tails and are similar in shape to lizards, but have no scales on their bodies. Unlike frogs, it has a long tail throughout its life. Its limbs are underdeveloped, and its adult body can be divided into aquatic, terrestrial and semi-aquatic categories.

Aquatic types lay eggs in the water, terrestrial types return to the water to lay eggs during reproduction, and a few species lay eggs on wet land, and the larvae develop and grow in the water after laying eggs.

Salamanders have tails and are similar in shape to lizards, but they have no scales on their body surface, and they are smooth and sticky. Salamanders have poor vision and rely mainly on their sense of smell to prey on tadpoles, frogs, and small fish. Salamanders have underdeveloped limbs, but can walk on muddy surfaces at the bottom of ponds with their forefeet or toes, and speed up their walking by wagging their tails.

The adult body of salamanders can be divided into aquatic, terrestrial and semi-aquatic categories. Aquatic types lay eggs in the water, terrestrial types return to the water to lay eggs during reproduction, and a few species lay eggs on wet land, and the larvae develop and grow in the water. At present, there are hundreds of species of salamanders in the world, distributed in humid environments everywhere.

1. Newt genus: 4 species are known in China, namely Chinese newt, Hong Kong newt, tailed spot newt, and Guangxi newt.

2. Acanthosaurus: There are 3 species known in China, namely Ryukyu acanthus, Zhenhai acanthus, and fine mole acanth.

3. Oxid: There is only one species.

4. Wart newt: 6 species (subspecies) are known in China, namely Hainan wart newt, fine mole and verrucous newt (named subspecies, Wenxian.

subspecies), Great Liang colocous newt, Guizhou corucous newt, red mute newt.

5. Salamander: 6 species (subspecies) are known in China, namely the Oriental salamander.

Chaoshan salamander, blue-tailed salamander (named subspecies, Chuxiong subspecies), Chenggong salamander, alpine spiny newt (newly discovered).

The basic characteristics of the oriental salamander: a small salamander, generally only 6 10 cm. The color of the back is usually black, but there are also individuals with greenish, grayish, or dark spots.

The back** is smoother. The ridges are not very prominent. The abdomen is orange-red with black spots, and there are very few without dark spots.

The end of the tail is rounded and blunt (male) or pointed (female), and the lower edge of the caudal fin fold is all orange-red. The toes of the limbs are thinner.

The basic characteristics of the red-bellied salamander: the body size is generally about 9 13cm. The back is available in a variety of colors, including black (some types have orange spots), yellow-green mixed with black spots, etc.

The ** on the back is rougher, the ridges are more pronounced, and one type of ridges is orange. Protrusion of the glands behind the ear. The lateral edges of the body are distinct.

Most of the abdomen is orange with dark spots, and some types of abdomen are black on both sides with orange honorific in the middle and fine white, orange, and black spots. The tail end is pointed. The lower margin of the caudal fin fold is mostly orange, the hind half to the end is black, and the upper margin is orange or dorsal (different subspecies).

Males have a blue tail with dark spots during the breeding season. The toes of the limbs are thinner.

Salamander is the common name of amphibians and tails, with a total of ten families and more than 400 species. For example: giant salamander, oriental salamander, fire salamander, red colocous newt, western newt, etc.