It is considered a monotype. It is smaller in size and has a brighter red colored fur, distinguishing it from other congeners.[3]
Though the species has been known for over a century, very few specimens have been studied, most of these from areas below 600m and taken from western edges of the Amazon basin and Guianas. Its dorsal pelage is reddish-brown and its ventral pelage is grayish. Researchers believe this coloring is product of adaptation to a humid forest environment.[3]