NJ Plesiosaur

[vasili1017]

I'm pretty sure I found my first Plesiosaur tooth in the streams of Monmouth County. Can anyone confirm? Thank you

[Trevor]

The last pic actually changed my ID of it, that's 100% xiphactinus 

[Miocene_Mason]

I agree with xiphactinus

[All Day Rocks]

I also agree with xiphactinus

[Al Dente]

I think it is a reptile tooth. I've never seen Xiphactinus teeth with striations. I'm not too familiar with plesiosaur teeth but I think it is a good possibility for your tooth. If not plesiosaur then it could be some type of croc tooth.

[izak_]

I agree with Al Dente. Looks incredibly similar to pliosaurid teeth that I have seen.

[Doctor Mud]

Looks reptilian to me.

 

A link to a topic on plesiosaur teeth with lots of pics. 

@sseth might be helpful. He is a self confessed marine reptile junkie.

[Trevor]

Xiphactinus sp. of New Jersey have been known to have slight striations. The song nature crown, with that inward curve evident in the last photo, is the giveaway that that tooth is not plesiosaur. 

 

https://www.researchgate.net/profile/David_Schwimmer/publication/254314020_Xiphactinus_vetus_and_the_distribution_of_Xiphactinus_species_in_the_eastern_United_States/links/555bf74d08ae8f66f3adc849/Xiphactinus-vetus-and-the-distribution-of-Xiphactinus-species-in-the-eastern-United-States.pdf?origin=publication_detail

[Carl]

I'm pretty firmly in the plesiosaur camp here. Plesiosaur teeth have an oval cross-section lacking any carinae. That's what I am seeing here. Xiphactinus has clear carinae. And those striations looks so much more like plesiosaur teeth I've seen than Xiphactinus.

[vasili1017]

Carl brings up an important point; this tooth does not have carinae. Here's another angle 

[Trevor]

From that angle it looks a lot more like plesiosaur, especially with its morphology. Sorry I misidentified it.

[erose]

Trust Carl. Nice REPTILE tooth.

 

[sseth]

I am quite confident it is plesiosaur.  Very nice tooth.

[vasili1017]

Woo I'm excited! Thanks everyone 

[Max-fossils]

Awesome find! Congrats 

[hxmendoza]

I'm in the plesiosaur camp. 

Beautifully preseved tooth!

Great find.

[JohnBrewer]

Nice find. I think your photography is excellent along with the use of your tweezer thingy

[JarrodB]

Plesiosaur