''Lagostomus'' is a South American genus of

rodents Rodents (from Latin , 'to gnaw') are mammals of the order Rodentia ( ), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents. They are n ...

in the family

Chinchillidae The family Chinchillidae is in the order Rodentia and consists of the chinchillas, the viscachas, and their fossil relatives. This family is restricted to southern and western South America, mostly living in mountainous regions of the Andes, ex ...

. It contains a single living species, the

plains viscacha The plains viscacha or plains vizcacha (''Lagostomus maximus'') is a species of viscacha, a rodent in the family Chinchillidae. It is the only living species within the genus '' Lagostomus''. It is found in Argentina, Bolivia, and Paraguay. The ...

, and it is the only

Holocene The Holocene () is the current geologic time scale, geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene to ...

genus in the subfamily Lagostominae. It probably only has one extant species; the taxa ''Lagostomus crassus'' is probably not valid.

References

Chinchillidae Rodent genera Mammal genera with one living species Taxa named by Joshua Brookes Taxonomy articles created by Polbot {{Rodent-stub