Tooth vs Horn Coral

[ken@littlemiami]

Hello. I'm a new member and wondering if anyone can help me identify this item. From my research, I believe it's a tooth vs horn coral, but I've had very little luck identifying otherwise. I discovered this a few days ago in a creek bed in southwestern Ohio. It measures about an inch (or 2.5 cm). In profile, on the backside is a pretty pronounced barb toward the tip. Any ideas??

Edited June 30, 2020 by ken@littlemiami
added images

[FossilNerd]

It looks like a very water worn solitary rugose “horn” coral to me. If you were in the extreme southwestern part of Ohio, you most likely were in the Ordovician, which would lend itself more to a horn coral ID than large tooth. 

[pjullien]

I don't know...is there a way to take the picture of one of the "sides" or "edges"?  Is it flat on the edge or no?  The reason I mention this is that I have collected quite a few end pieces of horn coral and this has a different appearance. 

[Ludwigia]

I'd say worn horn coral as well, but a few more photos as pjullien is requesting would help affirm that.

[Pumpkinhead]

This looks like a worn rugose coral. You can tell because of the septa (lines running down the sides/looks sort of like the spokes of a bicycle when you look down the long axis on most well-preserved examples)

[ken@littlemiami]

I understand the thoughts on worn rugose. I added some profile images to show how it scoops in on the back. I find a fair amount of horn coral here, but this one stopped me as the material seems more bone like vs the others I've collected. Thanks for the thoughts. 

[Fossildude19]

+1 for the Rugose coral camp. 

[Troodon]

+1 for Rugose coral

[pjullien]

"You can tell because of the septa (lines running down the sides/looks sort of like the spokes of a bicycle when you look down the long axis on most well-preserved examples)" 

 

Thanks Pumpkinhead...that makes sense

[ken@littlemiami]

Appreciate all of the input. Helpful in my continuing education.