Ichthyosaur ribs

A stone with two ribs, a half vertebra and some rests of some belemnits from the quarry Kromer near Holzmaden (Lower Jurassic). All the bones are Ichthyosaur bones.

The story of this one is kinda curious because on the stone was firstly only the damaged vertebra visible. But after a hit with my hammer I saw two cross sections, which belong to Ichthyosaur ribs:

After some prep:
 

And some pictures of the result:
 

It was very tough to prep it because the stone is extremely hard and the separation layer between the fossil and stone was bad. I think all in all it took about 5 hours to finish this one. I am not completely satisfied with the result but its okay.