Potosinae is a term that refers to a group of rodents native to South America, including chinchillas and viscachas. There are several synonyms for this term, including Andean chinchilla rats, chinchilla mice, and mountain viscachas. These terms are used to describe different species within the Potosinae group, with Andean chinchilla rats referring to smaller rodents that resemble chinchillas, while mountain viscachas are large, rabbit-like creatures that live in burrows near the tops of mountains. Regardless of the specific term used to describe them, Potosinae rodents are known for their soft, plushy fur and their ability to thrive in harsh mountain environments.