This climbing mouse occurs in the Atlantic Forest of southeastern Brazil. The study records it at several sites from Rio de Janeiro to eastern São Paulo.
The back varies from reddish or yellowish brown to dark reddish brown. The underside is white, sometimes with small light-gray areas along the abdomen.
Most specimen sites were in dense rainforest or coastal forest of the Serra do Mar. Streams and rocky outcrops were recorded at the type locality.
An extinction-risk assessment has not been added yet.