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Castoroides (Latin: "beaver" (castor), "like" (oides) [2]), or the giant beaver, is an extinct genus of enormous, bear-sized beavers that lived in North America during the Pleistocene. Two species are currently recognized, C. dilophidus in the Southeastern United States and C. ohioensis in most of North America.
Skull of a beaver. Castoridae is a family of rodents that contains the two living species of beavers and their fossil relatives. A formerly diverse group, only a single genus is extant today, Castor. Two other genera of "giant beavers", Castoroides and Trogontherium, became extinct in the Late Pleistocene.
In their natural range in North America, bears and wolves prey on the beavers and keep the population under control. One observer noted that anyone considering importing beavers should also import bears, those being the beavers' natural predators. [4] According to a June 2011 NPR report, 200,000 beavers were living in the area. [6]
Giant beaver may refer to: Castoroides, an extinct Pleistocene genus of beavers from North America; Trogontherium, an extinct Pleistocene genus of beavers from Eurasia
The American beaver is slightly smaller in average body mass than the Eurasian species. [35] The head-and-body length of adult North American beavers is 74–90 cm (29–35 in), with the tail adding a further 20–35 cm (7.9–13.8 in).
North American beavers build more open-water lodges than Eurasian beavers. Beaver lodges built by new settlers are typically small and sloppy. More experienced families can build structures with a height of 2 m (6 ft 7 in) and an above-water diameter of 6 m (20 ft).
At 90–113 kilograms (198–249 lb), 40% larger than the living capybara, [1] N. pinckneyi is one of the largest rodent species ever discovered, surpassed only by Josephoartigasia monesi, several species of Phoberomys, and possibly the Pleistocene giant beaver. [2] Remains have been found in southern North America, from Arizona to Florida to ...
An extinct beaver species: Western North America: Late Miocene to Early Pleistocene [1] Castoroides: Giant beavers: North America: Up to 100 kg (220 lb) Pleistocene [1] Ceratogaulus: Horned gophers: North America: Smallest horned mammal: Late Miocene to Pliocene [2] Spelaeomys: S. florensis: A large cave rat: Flores-Extinct by 1500 [3] "Giant ...