Gardner's Rhipidomys is an arboreal rodent recorded in upper drainage systems of western Brazil, eastern Peru, and northeastern Bolivia. Its dorsal fur is short and coarse, ranging from gray to orange-brown.
The dorsal fur is relatively short and coarse, gray to orange-brown. Ventral hairs are fulvous to yellow; gray-based hairs are limited to the midline of the throat and chest.
The stomach of one specimen from mature forest at a site in Ucayali, Peru, indicated feeding on insect larvae living inside bamboo stems.
An extinction-risk assessment has not been added yet.