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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.
During the Ice Age, Illinois was subject to glacial activity. At the time the state was home to creatures like giant beavers, mammoths, mastodons, and stag mooses. Paleontology has a long history in the State of Illinois, stretching at least as far back as the 1850s, when the first Mazon Creek fossils were being found.
Giant beaver may refer to: Castoroides, an extinct Pleistocene genus of beavers from North America; Trogontherium, an extinct Pleistocene genus of beavers from Eurasia
Trogontherium cuvieri grew larger than living beavers , with a skull up to 21 centimetres (8.3 in) in length, but was smaller than Castoroides. The incisors are covered in fine longitudinal grooves, and have a convex enamel face. The cheek teeth are high crowned. The sagittal suture of the skull is flanked by two deep depressions.
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Fossil of the Middle-Late Ordovician giant trilobite Isotelus. †Isotelus †Isotelus gigas †Isotelus maximus †Kionoceras †Latzelia – type locality for genus †Latzelia primordialis – type locality for species †Lepidodendron †Lepidodendron aculeatum †Lepidophyllum †Lepidostrobus †Lichas †Lingula †Liroceras; Lithophaga ...
Minnesota: The giant beaver was proposed in 2022. [3] New Hampshire: The American mastodon (Mammut americanum) was considered in 2015. [4] Texas: There is no state fossil though the state dinosaur is Sauroposeidon proteles. [5]
The giant beaver (Castoroides ohioensis) Several of the extinct South American dinomyids were much bigger than the modern rodents. Josephoartigasia monesi was the largest-known rodent of all time, approximately weighing an estimated 480–500 kg (1,060–1,100 lb). [205] Phoberomys pattersoni weighed 125–150 kg (276–331 lb). [205]