bthemoose Posted November 2, 2020 Share Posted November 2, 2020 After I remarked that the little tooth below (found on Morris Island, South Carolina) looked interesting on his trip report thread, forum member @Family Fun kindly gifted it to me, asking only that I help identify the species and share the result. My assessment is that this is an Isurus retroflexus posterior tooth, but hopefully others here can either confirm or correct that ID. This tooth has a non-serrated crown that is still fairly sharp and to my eyes at least has the raised labial platform indicative of I. retroflexus. There is a single cusplet on one side. Thanks for your help with this one, and thank you @Family Fun for your generosity! (Unfortunately, the tooth split down the middle on its journey to me, which is the crack you can see in the photos, but I was able to glue it back together.) 1 Quote Link to post Share on other sites
fifbrindacier Posted November 2, 2020 Share Posted November 2, 2020 I can't help you, but i find the colors of that tooth amazing. Quote Link to post Share on other sites
WhodamanHD Posted November 2, 2020 Share Posted November 2, 2020 I believe this is a thresher extreme posterior, likely giant thresher given the robustness. Unfortunately our reference material for positional variants in Giant threshers is scant and retros are fairly convergent with them so my ID comes with a grain of salt. 1 Quote Link to post Share on other sites
bthemoose Posted November 2, 2020 Author Share Posted November 2, 2020 Thanks, @WhodamanHD! Now that you mention it, I can see that as a strong possibility. I'll send these photos to Dr. Kent at UMD to see if he might weigh in. Quote Link to post Share on other sites
bthemoose Posted November 3, 2020 Author Share Posted November 3, 2020 @WhodamanHD, do you think this one might be retroflexus? I found it today at Matoaka. 1 Quote Link to post Share on other sites
WhodamanHD Posted November 4, 2020 Share Posted November 4, 2020 3 hours ago, bthemoose said: @WhodamanHD, do you think this one might be retroflexus? I found it today at Matoaka That would be my guess 1 Quote Link to post Share on other sites
siteseer Posted November 4, 2020 Share Posted November 4, 2020 I would expect the crown to be a little flatter but maybe. 1 Quote Link to post Share on other sites
bthemoose Posted November 4, 2020 Author Share Posted November 4, 2020 12 hours ago, siteseer said: I would expect the crown to be a little flatter but maybe. Thanks for looking! Do you have other thoughts on what it might be? Quote Link to post Share on other sites
siteseer Posted November 4, 2020 Share Posted November 4, 2020 6 minutes ago, bthemoose said: Thanks for looking! Do you have other thoughts on what it might be? It's more likely an I. oxyrinchus posterior tooth. Jess 1 Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.