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The marmosets are 22 New World monkey species of the genera ''Callithrix'', ''Cebuella'', ''Callibella'', and ''Mico''. All four genera are part of the biological family Callitrichidae. The term ''marmoset'' is also used in reference to the Goeldi's marmoset, ''Callimico goeldii'', which is closely related. Most marmosets are about long. Relative to other monkeys, they show some apparently primitive features: they have claws rather than nails, and tactile hairs on their wrists. They lack wisdom teeth, and their brain layout seems to be relatively primitive. Their body temperature is unusually variable, changing by up to 4 °C (7 °F) in a day.〔Stafford, S.G. (1999). "Thermoregulatory and Endocrine Adaptations of Small Body Size in Primates". Kent State University Dissertation, QP 135.S73, 1999.〕 Marmosets are native to South America and have been found in Bolivia, Brazil, Colombia, Ecuador, Paraguay and Peru.〔Primate Info Net, Callithrix Factsheet, University of Wisconsin, Madison.〕 They have also been spotted in Central America and Mexico.〔http://anthro.palomar.edu/primate/prim_5.htm〕 They are also raised in captivity as pets. According to recent research, marmosets exhibit germline chimerism, which is not known to occur in nature in any primates other than callitrichids. Ninety-five percent of marmoset fraternal twins trade blood through chorionic fusions, making them hematopoietic chimeras. ==Species list== * Genus ''Callithrix''—Atlantic marmosets * * Common marmoset, ''Callithrix jacchus'' * * Black-tufted marmoset, ''Callithrix penicillata'' * * Wied's marmoset, ''Callithrix kuhlii'' * * White-headed marmoset, ''Callithrix geoffroyi'' * * Buffy-headed marmoset, ''Callithrix flaviceps'' * * Buffy-tufted marmoset, ''Callithrix aurita'' * Genus ''Mico''—Amazonian marmosets * * Rio Acari marmoset, ''Mico acariensis'' * * Manicore marmoset, ''Mico manicorensis'' * * Silvery marmoset, ''Mico argentata'' * * White marmoset, ''Mico leucippe'' * * Emilia's marmoset, ''Mico emiliae'' * * Black-headed marmoset, ''Mico nigriceps'' * * Marca's marmoset, ''Mico marcai'' * * Black-tailed marmoset, ''Mico melanura'' * * Santarem marmoset, ''Mico humeralifera'' * * Maués marmoset, ''Mico mauesi'' * * Gold-and-white marmoset, ''Mico chrysoleuca'' * * Hershkovitz's marmoset, ''Mico intermedia'' * * Satéré marmoset, ''Mico saterei'' * * Rondon's marmoset, ''Mico rondoni'' * Genus ''Callibella''—Roosmalens' dwarf marmoset * * Roosmalens' dwarf marmoset, ''Callibella humilis'' * Genus ''Cebuella''—Pygmy Marmoset * * Pygmy marmoset, ''Cebuella pygmaea'' 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「marmoset」の詳細全文を読む スポンサード リンク
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