This tree-dwelling spiny rat occurs along Brazil's Atlantic coast. A 2015 South American rodent reference lists evergreen broadleaf forest and associated mangroves from Paraíba to São Paulo.
Its dark brown back is flecked by spines with rusty tips.
It is recorded chiefly in evergreen broadleaf forest and in associated mangrove habitat, from sea level to 1,000 m.
An extinction-risk assessment has not been added yet.