I have a mystery bone from an Early Bronze site (in Greece). I have uploaded some photographs on flickr for those who want to attempt to help me out with this one.
It has a very 'curvy' overall shape and it unfortunately preserves only a fraction of one of the two epiphyses. Also note the thin bone fragment fused on the larger 'curvy' shaft. Could it be a radius-ulna of an unknown-to-me species? I vaguely remember seeing similarly-shaped ('curvy') bones in human and marine mammal skeletons. I would not exclude the possibility that it is a pathological specimen. So far I had some (few) pathological dog specimens but this one's morphology is very different (in any case, humerus is the nearest shape from the dog elements).
Here are the photos: