Upper Carboniferous Crustacean, Fin, Claw, Tail?

[Titan]

Hi Everyone,

 

I've been working through quite a bit of shale from the Stark member and have a specimen I would like your thoughts on. My brain sees a crustacean claw due to the shape, but I think its more likely that it's a fin. What do ya'll think I have here?

Dimensions are 1 cm by 1 cm.

 

My "holding the phone camera to my microscope lens" method isn't working so well, so here's a rough outline of the shape:

And the counterpart from the split

 

Thanks,

[Fossildude19]

My first impression on this is a part of a skull, maxilla and lower jaw. 

 

 

 

 

 

 

[Bullsnake]

@Missourian

[FossilDAWG]

I wonder if the bone would fluoresce under a UV (i.e. "black") light?  If so that would make it easier to distinguish.

 

Don

[Titan]

@Fossildude19That's an interesting thought. I need to make a habit out of rotating my finds while studying them. Believe it or not I don't think I rotated it even once Thanks for your input!

 

@FossilDAWGGood idea Don! I'll give it a try, thank you.