Stumped on this small tooth found in Summerville, SC

[Sonickmonx]

I found this "tooth" yesterday and it has stumped me and those I've reached out to for an ID.  It is 10mm tall and 5mm wide.  It was found in a lag layer that appears to be primarily oligocene but it has some amount of pliocene as well.  First thoughts were things like megamouth, upper sixgill, or a ray denticle but none of these quite fit the bill to my liking.  It certainly appears to have a nutrient groove making me lean towards being a tooth.  The root is quite thick and it wants to stand on the root, it will not lie on its side.  The "blade" curves and has small shoulders where it meets the root.  I'm really quite stumped on this one and any input would be greatly appreciated!

 

[Al Dente]

It looks similar to a Notorhynchus upper symphyseal. Image from here.