Bison bonasus has been recognized in fossil material, dredged from the North Sea. It is postulated that this species appeared at the end of the Weichselian - beginning of the Holocene. Sexual dimorphism in Bison bonasus is clearly demon strated in the meta carpal bone.

Read more in the interesting article "Bison bonasus from the North Sea, the Netherlands", by Marc Drees and Klaas Post (CRANIUM 24, 2 - 2007).

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