Max-fossils Posted October 28, 2016 Share Posted October 28, 2016 Hello everyone, Im back again with more fossils to identify... This time they are shark teeth I received from Filipe Vieira ( @Vieira ) during a blind trade organized on this very forum. The trade went very well, I was extremely pleased with what he gave me. Unfortunately, there are a few of the shark teeth that he couldn't identify. They all come from Sesimbra, Portugal, from which the fossils date to the Miocene period, about 20 million years ago. In case you cannot see it in the photos, they all have small serrations (except for the third tooth). Some of the possibilities: lemon shark (Negaprion brevirostris), bull shark (Carcharinus leucas), Galapagos shark (Carcharinus galapagensis), hammerhead shark (Sphyrnidae), and blue shark (Prionace glauca), etc... If you want individual photos of one of the teeth, feel free to ask me in the comments below! Thank you already for your help, Max Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
Troodon Posted October 28, 2016 Share Posted October 28, 2016 All these teeth look like upper and lowers of Carcharhinus sp. Not sure what species really specific to that locality. Link to comment Share on other sites More sharing options...
Max-fossils Posted October 28, 2016 Author Share Posted October 28, 2016 Ok, thank you for the info! Let's see if others have more info about the species... Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
Max-fossils Posted October 29, 2016 Author Share Posted October 29, 2016 Anyone have more ideas? Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
sixgill pete Posted October 29, 2016 Share Posted October 29, 2016 As Troodon said more site specific info would be needed to possibly ID these to species level. Carcharhinus species vary worldwide and by the age of the deposit. And, often times Carcharhinus species are impossible to determine as many of the species teeth are so similar. 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...
sixgill pete Posted October 29, 2016 Share Posted October 29, 2016 I will add that the two teeth farthest left could be C. falciformas; Silky Shark. 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...
Guguita2104 Posted October 30, 2016 Share Posted October 30, 2016 Hello ! I think the third one (in the center) might be a lemon shark tooth. About the others I agree with Carcharinus sp. I don't if this info helps, but I think the layers are probably Burdigalian-Langhian-Serravalian in age. Regards, Link to comment Share on other sites More sharing options...
Troodon Posted October 30, 2016 Share Posted October 30, 2016 Still don't see lemon on anyone of them. They typically have enamel on the shoulder of the root which is lacking on the tooth your pointing to. It's a lower Carcharhinus sp. Link to comment Share on other sites More sharing options...
Max-fossils Posted October 30, 2016 Author Share Posted October 30, 2016 3 hours ago, Guguita said: Hello ! I think the third one (in the center) might be a lemon shark tooth. About the others I agree with Carcharinus sp. I don't if this info helps, but I think the layers are probably Burdigalian-Langhian-Serravalian in age. Regards, 23 minutes ago, Troodon said: Still don't see lemon on anyone of them. They typically have enamel on the the root surface which is lacking on the tooth your pointing to. It's a lower Carcharhinus sp. Ok, thank you for your help! I see you were asking for more precise age info: early Miocene, Burdigalian age, Eggenburgian stage (19-20 million years ago) The site is Sesimbra, Portugal, on the beach. Is that the info you needed? I can send individual pics of the teeth if you think it would help. Thanks again, Max Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
Troodon Posted October 30, 2016 Share Posted October 30, 2016 I'm not familiar with what species have been described from that locality and have not seen any technical papers on them either. Link to comment Share on other sites More sharing options...
Max-fossils Posted October 30, 2016 Author Share Posted October 30, 2016 Just now, Troodon said: I'm not familiar with what species have been described from that locality and have not seen any technical papers on them either. OK, well thanks anyways for your help! Maybe a specialist from the area will see this post and know more about it Best regards, Max Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
Troodon Posted October 30, 2016 Share Posted October 30, 2016 Here is a paper that talks about carcharhinus and other teeth from Portugal. None were described from that area and all are identified has either cf or sp. @Max-fossils 171-512-1-PB.pdf Link to comment Share on other sites More sharing options...
Vieira Posted November 3, 2016 Share Posted November 3, 2016 Smaller teeth like those are a little more difficult to identify because are some very similar... I agree with Trodoon in Carcharhinus sp. Link to comment Share on other sites More sharing options...
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