John Hamilton Posted March 17, 2012 Share Posted March 17, 2012 Has anyone ever found and positively identified a fossilized upper tooth from Isistius cf triangulus aka Cookiecutter Shark? Link to comment Share on other sites More sharing options...
Paleoc Posted March 17, 2012 Share Posted March 17, 2012 Good question. It would be very small and its distorted shape would easy make one pass it up as a damaged tooth. The difficulty in finding one would be: A. very small size B. distorted shape making ID hard C. extreme rarity of the species in any event. Link to comment Share on other sites More sharing options...
sixgill pete Posted March 17, 2012 Share Posted March 17, 2012 while i havent found any John, several have been found by forum members recently and posted here. Also George at the museum has one he found about a year ago. Bulldozers and dirt Bulldozers and dirt behind the trailer, my desert Them red clay piles are heaven on earth I get my rocks off, bulldozers and dirt Patterson Hood; Drive-By Truckers May 2016 May 2012 Aug 2013, May 2016, Apr 2020 Oct 2022 Link to comment Share on other sites More sharing options...
Northern Sharks Posted March 17, 2012 Share Posted March 17, 2012 I haven't seen any posted here Any that I've seen have been the triangular shaped lower teeth. The uppers are VERY fragile and I would be amazed if a nice one was found There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
Roz Posted March 17, 2012 Share Posted March 17, 2012 There are some on this post.. http://www.thefossilforum.com/index.php/topic/24814-lee-creek-smalls-and-micros/page__view__findpost__p__270900 Welcome to the forum! Link to comment Share on other sites More sharing options...
Northern Sharks Posted March 17, 2012 Share Posted March 17, 2012 (edited) Here is the jaw of a modern Kitefin shark, a relative of the Cookiecutter with similar teeth. The bottom teeth are the broad triangular ones, and the uppers are very narrow and sharp Edited March 17, 2012 by Northern Sharks There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
John Hamilton Posted March 18, 2012 Author Share Posted March 18, 2012 while i havent found any John, several have been found by forum members recently and posted here. Also George at the museum has one he found about a year ago. There are some on this post.. http://www.thefossil...post__p__270900 Don and Roz the teeth you are refering to all come from the lower jaw which I have one of. The upper teeth are much smaller and appear to have a sand tiger like shape. I'll try to get some pictures of the modern dentition that is on display at the Aurora Fossil Museum to post here. Link to comment Share on other sites More sharing options...
John Hamilton Posted March 18, 2012 Author Share Posted March 18, 2012 Here is the jaw of a modern Kitefin shark, a relative of the Cookiecutter with similar teeth. The bottom teeth are the broad triangular ones, and the uppers are very narrow and sharp Thanks Northern. Link to comment Share on other sites More sharing options...
Nandomas Posted March 18, 2012 Share Posted March 18, 2012 (edited) Here is the jaw of a modern Kitefin shark, a relative of the Cookiecutter with similar teeth. The bottom teeth are the broad triangular ones, and the uppers are very narrow and sharp I never found one, not lower nor upper. I did this photo at Venice shark tooth festival. I thought that was a cookiecutter mouth, but a very kind vendor told me it's another brand of shark Edited March 18, 2012 by Nandomas Erosion... will be my epitaph! http://www.paleonature.org/ https://fossilnews.org/ Link to comment Share on other sites More sharing options...
sixgill pete Posted March 18, 2012 Share Posted March 18, 2012 John, I missed the upper in your post. Guess I need to read better. Bulldozers and dirt Bulldozers and dirt behind the trailer, my desert Them red clay piles are heaven on earth I get my rocks off, bulldozers and dirt Patterson Hood; Drive-By Truckers May 2016 May 2012 Aug 2013, May 2016, Apr 2020 Oct 2022 Link to comment Share on other sites More sharing options...
John Hamilton Posted March 18, 2012 Author Share Posted March 18, 2012 John, I missed the upper in your post. Guess I need to read better. No worries. I've done the same thing several hundred times myself. Link to comment Share on other sites More sharing options...
Coco Posted March 18, 2012 Share Posted March 18, 2012 Nando, I think the jaw the man has in his hand is a Dalatias licha (kitefin shark). Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Pareidolia : here Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
siteseer Posted March 18, 2012 Share Posted March 18, 2012 I've seen a fossil Somniosus upper but not an Isistius. You'd really have to know what you're looking for to recognize it, because at a glance, it might look just like a small, spindly bone piece with a shiny end. Has anyone ever found and positively identified a fossilized upper tooth from Isistius cf triangulus aka Cookiecutter Shark? Link to comment Share on other sites More sharing options...
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