Of all the amazing fossil tusks we have handled of this rare prehistoric beast, this specimen is without question, the MOST UNIQUELY COLORED AND FINEST we have offered to date. With EXCEPTIONAL preservation and RARE baby blue and ivory white highlights, this UPPER fossil tusk incisor comes from the prehistoric GIANT BEAVER, Castoroides. It was found in a spring fossil deposit of crystal clear water rather than a river where the dark tannins of the water would have colored it the typical dark brown or solid black. It is of maximum thickness and would have come from a bear-sized beaver of the North America's final Ice Age. It is a SUPREME specimen, rarely seen in this preservation, and NEVER in this color!
A premium quality Castoroides fossil tusk is coveted by all that collect Pleistocene North American Ice Age fossils. The main incisors are the most requested fossil of this fascinating extinct giant animal. FINE QUALITY fossils of giant beaver are very difficult to ever find on the market.
Every detail is perfectly preserved with an extraordinary, naturally lustrous enamel of BLACK, BLUE, BABY BLUE AND IVORY WHITE hues! The classic chewing wear facet is evident from rubbing against the opposing tusk and is perfectly preserved.
Castoroides, or 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 US and C. ohioensis in the rest of its range. C. leiseyorum was previously described from the Irvingtonian of Florida, but is now regarded as an invalid name. All species previously described as C. leiseyorum are considered to belong to C. dilophidus.
Prehistoric giant beavers 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) to 125 kg (276 lb). This makes it the largest known rodent in North America during the Pleistocene and the largest known beaver to have ever lived.
One of the defining characteristics of the giant beaver was their incisors, which differ in size and shape from those of modern beavers. Modern beavers have incisor teeth with smooth enamel, while the teeth of the giant beaver were much larger up to 15 cm (6 in) long, with a striated, textured enamel surface.
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