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Northern treeshrew : ウィキペディア英語版
Northern treeshrew

The northern treeshrew (''Tupaia belangeri'') is a treeshrew species native to Southeast Asia.
In 1841, the German zoologist Johann Andreas Wagner first used the specific name ''Cladobates belangeri'' for treeshrews that had been collected in Pegu during a French expedition to Southeast Asia. These specimens were described by Isidore Geoffroy Saint-Hilaire in 1834 in whose opinion they did not differ sufficiently from ''Tupaia tana'' to assign a specific rank.〔Wagner, J. A. (1841). (''Das peguanische Spitzhörnchen''. ) In: ''Die Säugethiere in Abbildungen nach der Natur mit Beschreibungen''. Supplementband 2. Erlangen: Expedition des Schreber'schen Säugethier- und des Esper'schen Schmetterlingswerkes. Pp. 42–43.〕〔Geoffroy Saint-Hilaire, I. (1834). (Insectivores vivant dans le continent de l’Inde ou dans le grand Archipel indien. Les Tupaias ) In: Bélanger, C. P., Geoffroy Saint-Hilaire, I., Lesson, R. P., Valenciennes, M., Deshayes, G, P., Guérin, F. E. (eds.) ''Voyage aux Indes orientales, pendant les années 1825 a 1829 par M. Charles Bélanger. Zoologie, Mammifères.'' Paris: Arthus Bertrand. Pp. 103–107.〕
== Characteristics ==
Results of a telemetry study involving northern treeshrews showed that their body temperature varies from during the night to during the day. This difference is larger than in other endotherms, and indicates that the circadian rhythms of body temperature and locomotor activity are synchronized.〔Refinetti, R., Menaker, M. (1992). ''Body temperature rhythm of the tree shrew'', Tupaia belangeri. Journal of Experimental Zoology 263(4): 453–457.〕
Complete mitochondrial genome data support the hypothesis of a closer phylogenetic relationship of ''Tupaia'' to rabbits than to primates.〔Schmitz, J., Ohme, M., Zischler, H. (2000). ''The complete mitochondrial genome of Tupaia belangeri and the phylogenetic affiliation of Scandentia to other eutherian orders''. Molecular Biology and Evolution 17(9): 1334–1343.〕
The northern treeshrew was one of 16 mammals whose genomes were sequenced by staff of the Broad Institute, which released a low-coverage assembly of the genome in June 2006. The genome will be useful in comparisons with the other genomes to identify genes.〔(Tree Shrew (''Tupaia belangeri'') )〕
Adult weight: 0.2 kg (0.44 lbs)
Maximum longevity: 11 years

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