Salamanders

Salamanders are amphibians and are, despite their appearance, not reptiles or even a lizard. There are about 500 different species of salamander in the world today. Salamander found in Cuadata frame but sometimes referred to as belonging to Urodela. They were divided into 3 suborders and 10 different families.

In most species, adult salamanders will have a body similar to a lizard, a slender body with four legs and tail. Most of the species have four toes on front feet and five on the hind legs. But there are species of salamanders, to various degrees, have the limbs reduced or no make them look more like a snake or eel. Many species of salamander with bright and beautiful they have become popular pets. There are also colored and rather dull looking salamander species, but they are not very common in the pet trade.

Salamanders that live on land and semi-aquatic, but there are also species that live underground. Salamander may appear slimy and it is because they produce mucus to keep the ground moist and help set the osmotic water flow (ie, maintaining the right level of salt in the body). This mucus also help salamanders move more easily through the water.

Salamander often hide and hibernate in wood producing old myth that the salamanders are born from the fire. People have dry lumber containing salamanders hidden fire that will crawl out of the fire seems to hurt.

Thirds of all known species of salamanders are native North America, but salamanders can be found at many places and in good dry and wet environments. They do not live in Antarctica and absent from most parts of Africa and Australia as well. The largest concentration of salamander species can be found at Appalachian mountains in North America.

Many salamanders grow to be between 10-20 cm / 4-8 in Some species grow, but much smaller or larger than that. Salamander is the largest in the world China's giant salamander is a rare animal that can grow with the length of 1.8 meters (5.9 feet) and weighing up to 65 kg (140 lbs). The world's smallest lizard species are salamanders that grow Minutes total length 2.7 cm (1.1 in).

Salamander is the various groups of animals with characteristics very different anatomy. Some species have lungs, while others breathe through gills. There are also species that have both lungs and gills as adults. Interestingly enough, the lungs salamanders are more moderate than the type of lung found in mammals. There are also several species of salamanders that do not have both gills and lungs and breathe through their skin. Some species of the lungs ability to breathe through the defense of the skin.

Salamanders need moisture to grow. Most of the species retain their eggs in water, but some species use the soil moist and there are also species that give birth to live young after defending the eggs until they are ready to hatch. Many salamanders using internal fertilization in which the male deposits sperm in kloaka female bag. However, some species are more primitive, Cryptobranchoidea, use external fertilization.

Salamander larvae of some water while others are completely dependent on terrestrial species. Larvae of some species have feet. Eventually, the larvae go through metamorphosis which includes many changes to the anatomy, with larvae of different species will go through different changes. Level larvae can survive anything from days to years depending on the species.