Hi all
My kids and I found this tooth a while ago from the North Sulphur River in Texas. We can't figure out its ID and would appreciate any help. There is no carina; however, there are deep groves at the base. It appears cylindrical. After looking at various images, I can't tell if this is from a fish or a marine reptile like at plesiosaur. Images are below; the scale is 1 mm between the smaller hashmarks.
Again, thanks for any help!
Bret