The silky oldfield mouse occurs in the northwestern Colombian Andes. It has long, soft fur, while information about its habitat remains limited.
Its long, silky, dark-brown fur has blackish tips. The sides are paler, and the underside ranges from cinnamon buff to tawny olive.
Little is known about its ecology. From the available records, the account considers moist montane forest and páramo among its likely habitats.
An extinction-risk assessment has not been added yet.