Josephoartigasia monesi was a giant prehistoric rodent from the Pliocene, the largest known to date. It is estimated that between four and lived two million years in what is now Uruguay. It is an extinct species of rodent and as said the largest rodent in history.
The species measured approximately 3 m long and 1.5 m high. In life they were about the size of a car. Their incisors were more than 30 cm long. The animal weighed about a ton, and fed on soft grasses.
The fossil (the skull), more than half a meter, it belonged to a species closely related to the current hamsters, and found the first skull of an animal that was known to have existed but over which he had of remains found.
Among their predators can find the cave lion and Smilodon.