Shark tooth identification

[jonnyquest]

Hello forum members. Here are some teeth I found recently in a n.j. brook that I could use some help with.  1 to 8?? 

 

  The other pic is a mix of mostly goblin and porbeagle sharks from past trips.  First and second tooth at the top left are pathological. One twisted Archaeolamna kopingensis and the second is goblin shark  that is hooked or fanged.

 

 

[Al Dente]

#2 and 5 look like Anomotodon. #1 might also be Anomotodon, or Scapanorhynchus with the side cusps broken off.

[jonnyquest]

On 7/27/2022 at 4:45 AM, Al Dente said:

#2 and 5 look like Anomotodon. #1 might also be Anomotodon, or Scapanorhynchus with the side cusps broken off.

On 7/27/2022 at 4:45 AM, Al Dente said:

#2 and 5 look like Anomotodon. #1 might also be Anomotodon, or Scapanorhynchus with the side cusps broken off.

Thanks.  So, there's no way #2 could be from a  thresher shark?  

[Al Dente]

13 minutes ago, jonnyquest said:

Thanks.  So, there's no way #2 could be from a  thresher shark?  

I think the teeth you have collected are all Cretaceous, which is too old to have thresher sharks. The earliest Alopias are Eocene.

[jonnyquest]

 Thanks.  I was thinking of Paranomotodon angustidens (cope). Looks very similar to what I have. But so does anomotodon. 

  

Edited July 29, 2022 by jonnyquest

[Al Dente]

7 hours ago, jonnyquest said:

 Thanks.  I was thinking of Paranomotodon angustidens (cope). Looks very similar to what I have. But so does anomotodon. 

  

I always forget about Paranomotodon. It is possible that your teeth belong to that genus.

[Al Dente]

Cappetta was the one who put Paranomotodon in with the Thresher sharks. He no longer believes it belongs there. 

 

 

 

[jonnyquest]

Thanks for the info.  Very interesting.  And since the roots are stream worn and not showing a shallow nutrient groove I may never know for sure what it is.  So I guess it goes into the indeterminate display case.

Any ideas on 3,4,6,7,8?

[Al Dente]

#6 and 7 are probably Carcharias samhammeri.