What a great subject with loads of potential.
Think you should go back and do some really close work on this if possible.
as for the shot itself, maybe try a tighter crop to isolate some of the wonderful texture present in the skull itself.
I actually did have some tighter crops as it was the texture that first attracted me. None of them were anything special though (so far). I did do one tight picture of a different skull. This is the real fossil taken through glass.