Abrocoma Cuscomys †Protabrocoma Chinchilla rats or chinchillones are rodents of the family Abrocomidae.

They are social, tunnel-dwelling animals, and live in the Andes Mountains of South America.

Stiff hairs project over the three middle digits of the rear feet.

[2] Some molecular work[3] suggests that, despite their appearance, they may be more closely related to octodontoids such as degus, nutria, and tuco-tucos than they are to chinchillas and viscachas.

The family name is derived from the Ancient Greek word ἁβροκόμης (habrokomēs, "with delicate hair").