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Here are two links to posts dealing with how to post pictures on Black River Fossils forums.
1. How to Post Pictures on Black River Fossils Forums by ditchweezil
2. How to Post Pictures on Black River Fossils Forums by Daryl
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I think I got it...
I would agree Thresher Shark, and it appears to have not been too beaten up by the waves. Nice find!
That tooth might actually be the other species of thresher tooth found along Calvert Cliffs, Alopias superciliosus. This species is fairly rare here. The key defining feature of this form is a longer and slender crown, and usually the presence of a nutrient groove in the root. On most of my specimens, if I recall correctly, the root lobes tend to be a little longer and narrow(er) as well. Based on my own collection from the cliffs, I would say that the ratio is at least 25 to 1 regarding A. latidens to A. superciliosus.
Daryl.