Fossil spine?

[ToddsPoint]

I was looking at this nodule of flint from KY and noticed a fossil on the surface. I used a diamond file to expose it. It looks like a spine of some sort. Any ideas what it is?

 

[newnan man]

Looks like a Sting Ray spine, (stinger).

 

[tamrock]

Looks like a Sting Ray spine, (stinger).

That was my first thought, but never seeing the stinger of a sting ray fossil before I really don't know what it is.

 

[Blackfoot58]

Possibly a rib bone.

 

[robertk]

Could also be a claw, viewed from underneath. How big is it?

 

[ToddsPoint]

Could also be a claw, viewed from underneath. How big is it?

It’s about 1.5”.

 

[robertk]

It’s about 1.5”.

That's about right for a claw I would think. Though that's just a guess.