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pangolin : ウィキペディア英語版
pangolin

Pangolins (also referred to as scaly anteaters or trenggiling) are mammals of the order Pholidota. The one extant family, Manidae, has three genera: ''Manis'' which comprises four species living in Asia, ''Phataginus'' which comprises two species living in Africa, and ''Smutsia'' which comprises two species also living in Africa. These species range in size from . A number of extinct pangolin species are also known. The name pangolin comes from the Malay word "pengguling", meaning "something that rolls up". It is found in tropical regions throughout Africa and Asia.
Pangolins have large, protective keratin scales covering their skin; they are the only known mammals with this adaptation. They live in hollow trees or burrows, depending on the species. Pangolins are nocturnal, and their diet consists of mainly ants and termites which they capture using their long, specially adapted tongues. They tend to be solitary animals, meeting only to mate and produce a litter of one to three offspring which are raised for about two years. Pangolins are threatened by hunting (for their meat and armor) and heavy deforestation of their natural habitats, and are the most trafficked mammal in the world.〔http://www.nytimes.com/2015/03/31/science/a-struggle-to-save-the-scaly-pangolin.html?smid=tw-nytimes〕 All eight pangolin species are listed as threatened on the IUCN Red List of Threatened Species.
==Description==
The physical appearance of a pangolin is marked by large, hardened, overlapping plate-like scales. The scales, which are soft on newborn pangolins but harden as the animal matures, are made of keratin, the same material of which human fingernails and tetrapod claws are made. The pangolin's scaled body is comparable to a pine cone or globe artichoke. It can curl up into a ball when threatened, with its overlapping scales acting as armour and its face tucked under its tail. The scales are sharp, providing extra defense. The front claws are so long they are unsuited for walking, so the animal walks with its fore paws curled over to protect them.
Pangolins can also emit a noxious-smelling chemical from glands near the anus, similar to the spray of a skunk. They have short legs, with sharp claws which they use for burrowing into termite and ant mounds, as well as climbing.
The size of pangolins varies by species, ranging from . Females are generally smaller than males.
The tongues of pangolins are extremely elongated and extend into the abdominal cavity. By convergent evolution, pangolins, the giant anteater, and the tube-lipped nectar bat all have tongues that are not attached to their hyoid bone and extend past their pharynx deep into the thorax. This extension lies between the sternum and the trachea. Large pangolins can extend their tongues as much as , with a diameter of only .〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「pangolin」の詳細全文を読む



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