Squalicorax tooth ID (Monmouth, New Jersey)

[frankh8147]

I found this tiny Squalicorax tooth yesterday at Ramanessin Brook (Monmouth County, NJ Cretaceous). It's interesting to me because it appears to have a mesial heel (notch) that I've seen on other species of the shark but doesn't have a nutrient groove (which I believe disqualifies it from being Pseudocorax) so I'm trying to figure out what it is. 

 

Also, I don't believe Squalicorax bassanii is known from this location but I could be wrong.

 

Thanks!

-Frank

[Al Dente]

The notch might be a deformity.

[frankh8147]

10 minutes ago, Al Dente said:

The notch might be a deformity.

I'm thinking that too. The only thing that stopped me from calling it pathological and throwing it into the bin was the fact that the notch is in the same place as Pseudocorox and S. bassani.

 

I'm struggling on where to draw the line between different species and deformities. 

[Plax]

don't think I've seen bassani in the Navesink. Yangaensis though is found in the Woodbury. I agree with Al Dente.

[Bronzviking]

Nice tooth. Could be a freak, checkout my thread.

 

 

[xxxhalsteren]

 

I just noticed about what time period we where talking and in what time period I was thinking.
So it seems that my european knowledge does not cut it. Any good shark evolution articles/lectures for me to start learning about America ?
It's Always a good thing to increase your knowledge

[The Jersey Devil]

Neat tooth. Pseudocorax would have a nutrient groove, a deeper mesial indentation, and a lot of the time a more angled distal notch. Squalicorax bassanii/yangaensis is only found in the older deposits, has complex serrations, and a deep mesial notch.

 

This tooth isn’t pathological, but is rather a variation of Squalicorax “kaupi”. 

[Bronzviking]

41 minutes ago, The Jersey Devil said:

Neat tooth. Pseudocorax would have a nutrient groove, a deeper mesial indentation, and a lot of the time a more angled distal notch. Squalicorax bassanii/yangaensis is only found in the older deposits, has complex serrations, and a deep mesial notch.

 

This tooth isn’t pathological, but is rather a variation of Squalicorax “kaupi”. 

Hi Joseph, I just visited your website and found it very informative and a nice user-friendly web design. Thanks for sharing.

[The Jersey Devil]

1 hour ago, Bronzviking said:

Hi Joseph, I just visited your website and found it very informative and a nice user-friendly web design. Thanks for sharing.

 

Hi,

thanks a lot! It is a work in progress though; a lot of the descriptions aren’t written yet and some of the information has to be updated and improved/corrected.

[siteseer]

9 hours ago, xxxhalsteren said:

 

I just noticed about what time period we where talking and in what time period I was thinking.
So it seems that my european knowledge does not cut it. Any good shark evolution articles/lectures for me to start learning about America ?
It's Always a good thing to increase your knowledge

 

Wow, great tooth.  That must be a Centrophorus you were talking about in the Antwerp thread.

 

 

 

[siteseer]

6 hours ago, The Jersey Devil said:

Neat tooth. Pseudocorax would have a nutrient groove, a deeper mesial indentation, and a lot of the time a more angled distal notch. Squalicorax bassanii/yangaensis is only found in the older deposits, has complex serrations, and a deep mesial notch.

 

This tooth isn’t pathological, but is rather a variation of Squalicorax “kaupi”. 

 

I agree.

[frankh8147]

Thanks everyone! I will put this tooth somewhere good - out of the thousands of Squalicorax teeth I've found here, I've never seen that variation before.

 

Thanks again!