A rodent recorded in the central and eastern Andes of southern Colombia. Its back is dark brown, its underside pale, and its long tail has a white tip.
The fur is soft, dense, and relatively long. The back is mummy brown heavily washed with fuscous black; the underside ranges from ivory yellow to cream buff and darkens gradually toward the flanks. The very long tail has a white tip.
The account describes montane forest at 2,130–3,310m as its habitat.
An extinction-risk assessment has not been added yet.