Fossil centrum anatomical location and possibly species ID

[floridafossiljoel]

Any idea what part of the spinal column this centrum is from? I found it in Charlie Creek, offshoot of the Peace River in SW Florida.  So it's probably pliocene or pleistocene in origin.  The paper in the photo is 2 inches for size comparison.

 

It is not worn, and any unusual texture is I believe from degenerative changes in the animal before fossilization - because when you look close it is all well defined.  

 

It is very round for thoracic or lumbar, and doesn't have the classic ventral process of a cervical vert.  It does appear to have parallel crests along the bottom.  It is also a very strange angle, not boxy like lumbar or thoracic should be.

 

Any idea what location on the spine this is from?  Then, any idea what animal this could be?

[Brevicollis]

@Shellseeker, @Balance might help here to identify it, I have no idea from what it could be.

Edited May 25 by Brevicollis

[Balance]

I’m not real great at these but I believe the convex/concave is an Alligator thing. 
 

If it is, Its missing 75% of the rest. 
 

Jp 

[Harry Pristis]

The cross-section of the centrum does not look 'gator to me.  It looks more like an odontocete centrum.