Castoroides

Castoroides is an extinct genus of enormous beavers that lived in North America during the Pleistocene. C. leiseyorum and its northern sister species Castoroides ohioensis, were the largest beavers to ever exist.

Castoroides were much larger than modern beavers. Their average length was approximately 1.9 m (6.2 ft), and they could grow as large as 2.2 m (7.2 ft). The weight of the giant beaver could vary from 90 kg (198 lb) – 125 kg (276 lb). This makes it the largest known rodent in North America during the Pleistocene and the largest known beaver.

Jurassic Park: Builder
Castoroides can be created in the Glacial Park of Jurassic Park: Builder as a creature you buy with your real money.