worthy 55 6 Report post Posted February 5, 2008 What kind of shark tooth is this?? :Cave Man: Share this post Link to post Share on other sites
Gatorman 41 Report post Posted February 5, 2008 Looks like a Galeocerdo cuvier symphyseal tooth if there is such a thing. Share this post Link to post Share on other sites
worthy 55 6 Report post Posted February 5, 2008 It is one of the teeth I found in Gainesville and it just looks different than any that I have found. :huh: :huh: Share this post Link to post Share on other sites
Northern Sharks 269 Report post Posted February 5, 2008 Anson has nailed another one. It's a symphyseal from a Tiger shark. I don't know Florida too well, so it could be G. cuvier or possibly G.mayumbensis depending on the age. Cuvier is miocene-present, mayumbensis is oligocene-miocene and much more geographically limited. Share this post Link to post Share on other sites
Gatorman 41 Report post Posted February 5, 2008 Well I looked and it looks like i could be right Yay for me! But before you label it I would wait and see what NS and Harry think. I'm 90% sure its a Galeocerdo cuvier but I'm not so sure about it being a symphyseal, but it looks like one to me. Share this post Link to post Share on other sites
Gatorman 41 Report post Posted February 6, 2008 Well looks like NS posted while I was And he seems to agree with me, I do not have any information on whether or not Galeocerdo mayumbensis Is found in Gainesville creeks. I will do some research. Share this post Link to post Share on other sites
Gatorman 41 Report post Posted February 6, 2008 According to George's site (http://www.afn.org/~afn02877/page3.html) they can be found here along with nearly all the others so I am not sure. What are the defining differences in them? Share this post Link to post Share on other sites
Northern Sharks 269 Report post Posted February 6, 2008 According to George's site (http://www.afn.org/~afn02877/page3.html) they can be found here along with nearly all the others so I am not sure. What are the defining differences in them? As I said in my post, G.mayumbensis is older. Some sources say the 2 species (cuvier and mayumbensis) are different, some believe the differences are not enough to separate them. Elasmo.com says that, other than age, mayumbensis teeth have "simpler"serrations. With both species, each large serration is itself serrated, but G.cuvier is more complex. Also the angle of the serrations is different, but this could just be an evolving thing (sorry to use the E word -no arguments now). Go to elasmo.com-Lee Creek-Ground sharks-Galeocerdo mayumbensis and there's a link to an article about G.cuvier lineage. Share this post Link to post Share on other sites
worthy 55 6 Report post Posted February 6, 2008 Thanks guys! I have picked up alot of teeth from that creek but this the first of this kind. Are they kinda rare? :huh: :huh:WOW I just looked at it close and the serrations are serrated too cool! Share this post Link to post Share on other sites
Gatorman 41 Report post Posted February 6, 2008 Symphyseal teeth from any shark are fairly rare, about as rare as posteriors, there just isn't as many of them. Any Tiger's found in Gainesville creeks are not that common either, the majority of tigers are Galeocerdo aduncus. Share this post Link to post Share on other sites
worthy 55 6 Report post Posted February 6, 2008 I find a few tigers every time I go! :Thumbs-up: Share this post Link to post Share on other sites
Northern Sharks 269 Report post Posted February 6, 2008 Symphyseal teeth from any shark are fairly rare, about as rare as posteriors, there just isn't as many of them. Any Tiger's found in Gainesville creeks are not that common either, the majority of tigers are Galeocerdo aduncus. Tiger shark uppers and lowers look pretty much the same. I have a modern jaw and I count 10 rows on the bottom and 9 rows on the top per side of very similar looking teeth. This doesn't include the tiny posteriors. That's 38 rows of teeth that look alike, but with varying sizes. There is only 1 symphyseal row on the top and bottom which can curve either left or right. Just by these numbers, only 5% of teeth found would be symphyseal, but I think the number is considerably smaller than that. Share this post Link to post Share on other sites
