Micro pathological sawfish tooth from Post Oak Creek

[TRout]

Found this neat pathological sawfish or sawfish-like oral tooth today while searching through some Post Oak Creek matrix that I collected a couple years ago. I believe this should be of the cretaceous Eagle Ford Group of Texas. It appears to be two teeth that are fused together. My best guess on the ID is texatrygon, but I'm still not super confident with my "sawfish" teeth ID so I would welcome any additional opinions on ID. I've seen many interesting patho shark teeth posted here on the forum but I don't remember seeing any patho sawfish teeth so I thought this would be interesting to share. For scale, the grid is 5x5mm.

[MarcoSr]

As rays in a number of species grow, they increase the number of teeth in their jaws through a process called file-splitting.   This tooth may be an example of a tooth from a file-splitting file.  See the below TFF Thread.

 

 

http://www.thefossilforum.com/index.php?/topic/87439-ray-teeth-file-splitting/&tab=comments#comment-949291

 

 

Marco Sr.