Plains viscacha
（重定向自Lagostomus maximus）
The plains viscacha or plains vizcacha (Lagostomus maximus) is a species of rodents in the family Chinchillidae. It is the only living species within the genus Lagostomus. It is found in Argentina, Bolivia, and Paraguay. The plains viscacha is the largest species in its family. They construct elaborate burrows that house successive colonies for decades.