Stella's hylomyscus is a small climbing mouse with a long tail and rufous-brown back. It is recorded in montane forests of eastern Africa.
It is described with a rufous-brown back, gray belly, long dark tail, and large rounded ears. Its tail is about 1.5 times the head-and-body length.
It is identified as a small climbing mouse, with records from high-elevation forest using canopy trees and shrubs.
An extinction-risk assessment has not been added yet.