Dimensions: 185mm long Location: Atlas mountains Jurassic outcrops, Morocco   I'm having trouble identifying this partial fossil bone. It's only smallish piece with some significant old broken sections but it still has a pretty distinctive blade-like shape and the internal structure visible at the end breaks is interesting.   My amateur impression is that it's too straight for a rib, it's asymmetric so not a chevron, so I was thinking maybe a fibula, or perhaps an ischium or s