Sanborn's squirrel has an olive-brown back, pale buff rings around its eyes, and usually white underparts. It occurs in lowland Amazonian rainforest in southeastern Peru.
The dorsum is uniformly olive brown, with bright pale-buff rings around the eyes and pale areas around the mouth. The underparts are usually pure white, though some are yellowish orange.
The 2017 account describes lowland rainforest and high-ground forest with a 40–50 m canopy and a dark, open understory. It is diurnal and appears to forage on the ground and in the understory.
An extinction-risk assessment has not been added yet.