The Cactus Deermouse is a small mouse with a tail longer than its body. It lives in deserts and dry areas and is active at night.
Average body length is about 8–9 cm, while the tail is about 10–14 cm. Back fur varies from pale gray to dark, and the underside is whitish.
It is nocturnal and lives in deserts and dry grasslands, often among cacti. During hot, dry periods it may enter daily torpor or aestivation.
An extinction-risk assessment has not been added yet.