NEW JERSEY Shark tooth fossil identification

[Pksuperfly]

Can anyone help me identify the two sharks teeth I found this past year.  Both were found in the beaches in Northern Ocean County in New Jersey. Thank you! 

Edited February 11, 2022 by Pksuperfly

[digit]

Look flat and unserrated. Look like mako shark teeth to me. We have a similar shark tooth in Florida which is now considered to be an ancestor of the Great White so we've had to learn to call ours "white shark" teeth instead of "makos". I think those in New Jersey might be Miocene age Isurus desori (a mako shark). Others more familiar with fossil collecting in the NJ may step in to correct me.

 

 

Cheers.

 

-Ken

[Pksuperfly]

It looks like there was some kind of serrated edge but it’s very worn.  Had to take a pic with my macro lens to see. 

[digit]

Ah, that changes things a bit! In Florida that would make this tooth a fossilized Great White (Carcharodon carcharias). Up in NJ this might be Carcharodon subauriculatus which may or may not be the same as Carcharodon chubutensis (this lineage of sharks seems to be in flux occasionally and I'm not certain of the latest thinking on this). This species would normally have small side cusps, one on either side of the main blade. Your teeth are quite worn which would have erased any evidence of the side cusps.

 

Here's a page I found that may be of use:

 

http://digsfossils.com/fossils/nj_shark_kirkwood.html

 

 

Cheers.

 

-Ken

[bthemoose]

I think these are both Great White teeth, which can be found in NJ as well: