Belongs within: Sciuridae.
The Callosciurini as recognised herein are a clade of tree squirrels found in southern Asia. The clade is supported by molecular analysis; the basal Funambulus is morphologically distinct from the remaining callosciurins (Mercer & Roth 2003).
<==Callosciurini |--ExilisciurusMR03 | |--E. exilisFS15 | `--+--E. concinnusFS15 | `--E. whiteheadiFS15 `--+--+--HyosciurusMR03 | | |--H. heinrichiMR03 | | `--H. ileileIT07 | `--+--Rubrisciurus rubriventerMR03 | `--ProsciurillusMR03 | |--P. abstrususFS15 | |--P. murinusFS15 | |--P. weberiFS15 | `--+--P. leucomusFS15 | `--P. rosenbergiiFS15 `--+--+--+--RhinosciurusFS15 | | | |--R. laticaudatusMR03 | | | `--R. tupaioidesB74 | | `--TamiopsFS15 | | |--T. rodolphiiFS15 | | `--+--T. macclellandiiFS15 | | `--+--T. maritimusFS15 | | `--T. swinhoeiFS15 | `--DremomysMR03 | |--D. lokriahFS15 | `--+--D. pernyiFS15 | `--+--D. gularisFS15 | `--+--D. rufigenis (Blanford 1878)FS15, JK05 | `--+--D. everettiFS15 | `--D. pyrrhomerusFS15 `--+--SundasciurusFS15 | |--+--S. brookeiFS15 | | |--S. fraterculusFS15 | | |--S. jentinkiFS15 | | |--S. lowiiFS15 | | `--S. tenuisFS15 | `--+--S. davensisFS15 | |--S. hippurusFS15 | |--S. hoogstraaliFS15 | |--S. juvencusFS15 | |--S. mindanensisFS15 | |--S. moellendorffiFS15 | |--S. philippinensisFS15 | |--S. raboriFS15 | |--S. samarensisFS15 | `--S. steeriiFS15 `--+--NannosciurusFS15 | |--N. melanotusMR03 | `--N. surrutilusBF01 `--+--+--‘Callosciurus’ prevostiiIT07 | | |--C. p. prevostiiB49 | | `--C. p. rubiventerB49 | `--+--‘Callosciurus’ pygerythrusFS15 | `--+--‘Callosciurus’ albescensFS15 | `--‘Callosciurus’ nigrovittatusIT07 `--+--+--Menetes berdmoreiFS15 | `--LariscusFS15 | |--L. hoseiIT07 | |--L. insignisMR03 | |--L. niobeIT07 | `--L. obscurusIT07 `--+--GlyphotesMR03 | |--G. canalvusBP87 | `--G. simusMR03 `--CallosciurusMR03 | i. s.: C. flavimanusB74 | |--C. f. flavimanusVP89 | `--C. f. thaiVP89 | C. rosenbergiAC98 | C. sladeniB49 | |--C. s. sladeniB49 | `--C. s. midasB49 |--C. quinquestriatusFS15 `--+--C. melanogasterFS15 `--+--C. phayreiFS15 `--+--C. baluensisFS15 `--+--C. inornatusFS15 `--+--C. notatusFS15 `--+--C. adamsiFS15 `--+--C. orestesFS15 `--+--C. finlaysoniiFS15 `--+--C. canicepsFS15 | |--C. c. canicepsM76 | `--C. c. thaiwanensis Bonhote 1901M76 `--C. erythraeusSSH04
*Type species of generic name indicated
References
[AC98] Alcover, J. A., X. Campillo, M. Macias & A. Sans. 1998. Mammal species of the world: additional data on insular mammals. American Museum Novitates 3248: 1–29.
[B49] Baker, E. W. 1949. A review of the mites of the family Cheyletidae in the United States National Museum. Proceedings of the United States National Museum 99 (3238): 267–320.
[BF01] Bochkov, A. V., & A. Fain. 2001. Phylogeny and system of the Cheyletidae (Acari: Prostigmata) with special reference to their host-parasite associations. Bulletin de l’Institut Royal des Sciences Naturelles de Belgique Entomologie 71: 5–36.
[B74] Bugge, J. 1974. The cephalic arterial system in insectivores, primates, rodents and lagomorphs, with special reference to the systematic classification. Acta Anatomica 87 (Suppl 62): 1–160.
[BP87] Burton, J. A., & B. Pearson. 1987. Collins Guide to the Rare Mammals of the World. Collins: London.
[FS15] Faurby, S., & J.-C. Svenning. 2015. A species-level phylogeny of all extant and late Quaternary extinct mammals using a novel heuristic-hierarchical Bayesian approach. Molecular Phylogenetics and Evolution 84: 14–26.
[IT07] Isaac, N. J. B., S. T. Turvey, B. Collen, C. Waterman & J. E. M. Baillie. 2007. Mammals on the EDGE: conservation priorities based on threat and phylogeny. PloS One 2 (3): e296.
[JK05] Jenkins, P. D., C. W. Kilpatrick, M. F. Robinson & R. J. Timmins. 2005. Morphological and molecular investigations of a new family, genus and species of rodent (Mammalia: Rodentia: Hystricognatha) from Lao PDR. Systematics and Biodiversity 2 (4): 419–454.
[M76] Masui, M. 1976. Nihon no Doobutsu. Kogakukan: Tokyo.
[MR03] Mercer, J. M., & V. L. Roth. 2003. The effects of Cenozoic global change on squirrel phylogeny. Science 299: 1568–1572.
[SSH04] Steppan, S. J., B. L. Storz & R. S. Hoffmann. 2004. Nuclear DNA phylogeny of the squirrels (Mammalia: Rodentia) and the evolution of arboreality from c-myc and RAG1. Molecular Phylogenetics and Evolution 30: 703–719.
[VP89] Viney, C., & K. Phillipps. 1989. Birds of Hong Kong 5th ed. Government Printer: Hong Kong.