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Common marmoset
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Common marmoset : ウィキペディア英語版
Common marmoset

The common marmoset (''Callithrix jacchus'') is a New World monkey. It originally lived on the Northeastern coast of Brazil, in the states of Piaui, Paraiba, Ceará, Rio Grande do Norte, Pernambuco, Alagoas and Bahia. Through release (both intentional and unintentional) of captive individuals, it has expanded its range since the 1920s to Southeast Brazil (its first sighting in the wild for Rio de Janeiro was in 1929) and became there an invasive species, raising concerns about genetic pollution of similar species, such as the buffy-tufted marmoset (''Callithrix aurita''), and predation upon bird nestlings and eggs.
The whole-genome sequence of a female common marmoset was published on 20 July 2014. It became the first New World Monkey to have its genome sequenced.
==Physical description and morphology==

Common marmosets are very small monkeys with relatively long tails. Males and females are of similar size with males being slightly larger. Males have an average height of and females have an average height of . Males weigh on average and females weigh on average. The pelage of the marmoset is multicolored, being sprinkled with brown, grey, and yellow. It also has white ear tufts and the tail is banded. Their faces have pale skin and have a white blaze on the forehead.〔Groves C. (2001) ''Primate taxonomy''. Washington DC: Smithsonian Inst Pr.〕 The coats of infants are brown and yellow coats with the ear tuft developing later.
As with other members of the genus ''Callithrix'', the common marmosets have claw-like nails known as tegulaes on most of their fingers. Only their halluxes (big toes) have the flat nails or ungulaes that most other primates have.〔Garber PA, Rosenberger AL, Norconk MA. (1996) "Marmoset misconceptions". In: Norconk MA, Rosenberger AL, Garber PA, editors. ''Adaptive radiations of neotropical primates''. New York: Plenum Pr. p 87-95.〕 Marmosets have an arboreal locomotion similar to squirrels. They can hang on to trees vertically and leap between them, as well as run across branches quadrupedally.〔〔Kinzey WG. 1997. "Synopsis of New World primates (16 genera) ". In: Kinzey WG, editor. ''New world primates: ecology, evolution, and behavior''. New York: Aldine de Gruyter. p 169-324.〕 Tegulaes are an adaptation of this type of locomotion. Other ''Callithrix'' traits shared include enlarged, chisel-shaped incisors and specialized cecums for their diet.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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