Aptychus Ammonite?

[Napoleon North]

size: 8-9 mm x 4-5 mm

Edited January 25, 2014 by Napoleon North

[BobWill]

Not much to go on. Can you chip away any of the matrix to show a little more?

[KansasFossilHunter]

It looks like the "in" side of the aptychi I have found. If you could show any part of the other side, that should help.

[Napoleon North]

After preparation

Edited January 26, 2014 by Napoleon North