An arboreal rodent of the lower Amazon. It has a reddish nose and lacks dark stripes on the head.
It is one of the smaller Isothrix species. The nose is reddish, the head lacks dark stripes, and the flanks and rump are russet.
It is arboreal. A camera-trap study in the central Amazon recorded strictly nocturnal activity, based on 43 independent detections.
An extinction-risk assessment has not been added yet.