Garlepp's Mouse is a small rodent known from the high Altiplano of the Andes. Few specimens are available, so its life in the wild remains poorly understood.
It has a stout body and short tail, pale buff upperparts, and white fur on the belly and legs. Long fur grows on its large ears.
Natural-history information is limited. Known sites include high-elevation bunchgrass, and two Peruvian specimens came from a heavily grazed pampa with dwarf grass, prostrate herbs, and scattered thorny shrubs. Daytime activity has been suggested, but that idea rests on unpublished field notes.
An extinction-risk assessment has not been added yet.