Texas - Pleistocene jaw bone?

[johnnyvaldez7.jv]

Found this cool little fragment yesterday.  It's completely mineralized. Found it sticking out of sand which I don't usually find stuff in a bunch of sand...it's usually on a gravel bank. So I am happy with it. I find Pleistocene stuff here and i know it's 99% likely that I won't know what it belonged to...but...can anyone give me a thought on what bone it is. I thought perhaps a jaw bone...maybe because of that curve on the one side. But I dont see where teeth or root would have been nor do I have any good jaw examples anyway so I'm guessing. On the end...I don't think it ended there...I think it may have broken and has just been river worn and been smoothed out before it mineralized.  But I could be wrong. The bottom looks like a piece may have flaked off...which I've found flakey bones before...just never solid as rock as this is...so again perhaps pre-mineralization? But what bone could this be? At this point it's scrap, chunkosaurus, chunkotherium and all the other fun colorful terms but it's always good to ask.  Someone may recognize it. I don't think it's antler nor rib. Not a leg bone.  Not a foot bone nor digit.  

[jpc]

is this the same piece you posted on another post?  

[johnnyvaldez7.jv]

No. The other post is 1.5 inches...this is about 4 inches. 

[Brandy Cole]

I'm more inclined to think this is a piece of rib fragment, but it's hard to say.

[johnnyvaldez7.jv]

Here is an image from a post of mine some time back that didn't get an ID for a different specimen. It seems familiar with this current fossil. But as i mentioned....this new piece was found yesterday. The old post was considered a mandible and wood but no ID that fit. This is from a different post so not seeking ID on this thread just comparing.

[Brandy Cole]

This image seems to resemble a piece of alligator or crocodile jaw.  I think the pitted nature is a common feature in those.

 

I don't think it resembles your main piece a whole lot because it seems flatter in shape.