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Fossil Identification


Shark tooht from Treldenæs DK.


rodvig   17-02-2009 om 11:55

rodvig
Junior Lid
Lid sinds: 13-02-2009
Berichten: 18





Hi,

I wondered if anyone could help me identify this shark tooth, found at Treldenæs, Denmark. My initial thought was Heptranchias howelli, but I can’t seem to match the pictures found from other sources perfectly.

Thanks.





 
Supergraver   17-02-2009 om 13:04

Supergraver
Senior Lid
Lid sinds: 25-02-2005
Berichten: 4017

Hi Mikkel,

Well it looks like a Heptrachias to me too. I haven't much experience with this species but you found it in an Oligocene layer and the two Heptrachias I know of from the Oligocene are:Heptranchias ezoensis and Heptranchias tenuidens.
Maybe one of the 'specialist' here can help you further on your quest.

Regards,

Martijn

[Bewerkt door Supergraver op 17-02-2009 om 21:01 NL]

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Supergraver   17-02-2009 om 21:01

Supergraver
Senior Lid
Lid sinds: 25-02-2005
Berichten: 4017

Hi Mikkel,

Take a little look here: LINK


Regards,

Martijn

____________________________


 
tandenzoeker   24-02-2009 om 00:18

tandenzoeker
Senior Lid
Lid sinds: 10-11-2005
Berichten: 571

WOW!! VERY NICE indeed. Heptranchias sp. it is! Don't know the specific name though. Cappetta (1987) mentions 2 or 3 species:
*H. enzoensis, Oligocene, Japan
*H. tenuidens, Upper Oligocene, Venezuela
*H. howellii, Eocene and Oligocene of northwest USA.
It is possible the two last species are synonyms.
Maybe contact Sylvain Adnet at Clermont-Ferrand university in France, the only person I know of who's working on fossil hexanchids?

____________________________
"Wijze mensen praten omdat ze iets te zeggen hebben; dwazen, omdat ze iets willen zeggen." - Plato.

 
Galeocerdo   25-02-2009 om 15:49

Galeocerdo
Senior Lid
Lid sinds: 03-05-2005
Berichten: 479

That's an excelent tooth, great find, as far as I know Heptranchias howelli has been found there before. I would say Heptranchias howelli with a small question mark

____________________________
Gr. Taco


 
Isis   26-02-2009 om 12:21

Isis
Senior Lid
Lid sinds: 24-08-2005
Berichten: 616

Are you sure the find is oligocene and not eocene? I am aware of simular teeth from the Lillebelt frm. in DK. Adnet indeed describes Heptranchias howelli from the eocene of France. Welton (1974) decribes it from the eocene of US and canada. I can sent you a copy of the article if you want (drop me a mail).


____________________________
GIMME A HUG!
LINK

 
Supergraver   26-02-2009 om 18:13

Supergraver
Senior Lid
Lid sinds: 25-02-2005
Berichten: 4017

quote:
isis schreef:
Are you sure the find is oligocene and not eocene? I am aware of simular teeth from the Lillebelt frm. in DK. Adnet indeed describes Heptranchias howelli from the eocene of France. Welton (1974) decribes it from the eocene of US and canada. I can sent you a copy of the article if you want (drop me a mail).




Oops indeed, both Oligocene and Eocene are exposed in Treldenæs.

Martijn

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rodvig   27-02-2009 om 16:49

rodvig
Junior Lid
Lid sinds: 13-02-2009
Berichten: 18

Tandenzoeker: Yes, it is a good one. Thanks for the tip about Sylvain Adnet. Do you happen to have any contact information about him, in example an e-mail address?

Galeocerdo: There is information about a previous finding of Heptranchias howelli on Trelde næs. However I haven’t been able to get this confirmed, so I have my doubts about it as well.

Isis: There are both Palaeocene and Eocene layers on Trelde næs, but the tooth was not found in the clay, but among the sand and stones on the beach beneath the hills. That makes it difficult to precisely when it’s from.

“I can send you a copy of the article if you want (drop me a mail)” Done

Regards

Mikkel Rødvig,


[Editted by rodvig on 27-02-2009 at 16:52 GMT +1]

 
Isis   22-03-2009 om 11:23

Isis
Senior Lid
Lid sinds: 24-08-2005
Berichten: 616

quote:
rodvig schreef:
Galeocerdo: There is information about a previous finding of Heptranchias howelli on Trelde næs. However I haven’t been able to get this confirmed, so I have my doubts about it as well.


I can confirm that for you. I have a (less well preserved) specimen from the Lillebelt frm and know other collectors with specimens as well.

____________________________
GIMME A HUG!
LINK

 
Gerrit-Jan   22-03-2009 om 13:51

Gerrit-Jan
Senior Lid
Lid sinds: 21-01-2006
Berichten: 5495

Very nice!!

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Niets is leuker dan fossielen zoeken met vrienden

 




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