The least pygmy squirrel (''Exilisciurus exilis''), also known as the plain pygmy squirrel, is a species of

rodent Rodents (from Latin , 'to gnaw') are mammals of the order Rodentia (), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents. They are na ...

in the family Sciuridae.Thorington, R. W. Jr. and R. S. Hoffman. 2005. Family Sciuridae. pp. 754–818 ''in'' Mammal Species of the World a Taxonomic and Geographic Reference. D. E. Wilson and D. M. Reeder eds. Johns Hopkins University Press, Baltimore. This plain

olive The olive, botanical name ''Olea europaea'', meaning 'European olive' in Latin, is a species of small tree or shrub in the family Oleaceae, found traditionally in the Mediterranean Basin. When in shrub form, it is known as ''Olea europaea'' ...

-brown squirrel is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to forests, mostly below an altitude of but locally significantly higher, on the Southeast Asian islands of

Borneo Borneo (; id, Kalimantan) is the third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java, west of Sulawesi, and eas ...

Sumatra Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 473,481 km2 (182,812 mi.2), not including adjacent i ...

and

Banggi Banggi Island ( ms, Pulau Banggi) is located within the Kudat Division of Sabah in Malaysia. With an area of 440.7 square kilometres, it is the largest island in Malaysia followed by Bruit Island, Langkawi Island and Penang Island. It is locate ...

. Together with the

African pygmy squirrel The African pygmy squirrel (''Myosciurus pumilio'') is a species of rodent in the family Sciuridae. It is monotypic within the genus ''Myosciurus''. It is found in tropical rainforests in Cameroon, the Republic of the Congo, Equatorial Guinea, ...

, the least pygmy squirrel is the smallest squirrel in the world, having a total length of and a weight of .

References

Exilisciurus Rodents of Malaysia Rodents of Indonesia Mammals of Brunei Mammals of Borneo Taxonomy articles created by Polbot Mammals described in 1838 Taxa named by Salomon Müller {{Squirrel-stub