Fish Spine or Jaw bone Maybe?

[BoneAndTooth]

I have found several of these fossils over the last few months and would love some help identifying them.  Most are small, less than 1 inch long and difficult for me to photograph with any real detail.  But the last one I found is much larger by comparison.  It's just a fragment but it's about an inch and a half long and 1/2 inch wide.  They all taper from one end to the other and they all have raised bumps down one edge and a deep groove along the other edge.  The flat sides are textured.

 

They were all found in a creek in Southwest Alabama, US alongside Eocene shark, ray and sawfish teeth.

 

Suggestions so far include silurid spine, stingray barb, fish jawbone, and a piece of Noah's Ark.  I have not been able to find matching examples of any of them.

 

Any other ideas, or pictures to confirm one of the previous suggestions?

 

I posted some videos I shot if that helps. Not sure if it's permissible to link to them here so apologies if not...

 

 

Thanks!

[Al Dente]

Here’s another thread with similar fossils- http://www.thefossilforum.com/index.php?/topic/105075-eocene-era-marine-fossil-identification/&tab=comments#comment-1167342

[BoneAndTooth]

4 minutes ago, Al Dente said:

Here’s another thread with similar fossils- http://www.thefossilforum.com/index.php?/topic/105075-eocene-era-marine-fossil-identification/&tab=comments#comment-1167342

Yep, that's it. Thanks for pointing me in the right direction.