The Little Laucha is a small South American rodent weighing under 20 g. A study in central Argentine farmland reported a diet mainly of green plant material and seeds.
It weighs less than 20 g. Its back has gray-brown to golden-brown tones, while the underside is white; a white patch is also present behind the ears.
A study of cornfields and their borders in central Argentina found a mainly herbivorous-granivorous diet. During breeding, green forage was an important food requirement.
An extinction-risk assessment has not been added yet.