This long-clawed mouse is recorded in the Valdivian temperate rainforests of southern Chile. It was formerly placed in Pearsonomys and is now classified in Geoxus.
Its coat is coarse and dark brown to blackish above, with a paler underside. It has long feet and claws and relatively large ears.
A 1998–2005 survey captured it at three of eight localities, across continuous and fragmented forest and forestry plantations. The capture sites had relatively mature, closed vegetation and deep soils covered with leaf litter.
An extinction-risk assessment has not been added yet.