ynot Posted December 18, 2018 Author Share Posted December 18, 2018 Thought I should add this tooth.... Carcharhinus species alternate symphyseal tooth is the most likely ID for this little tooth. 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted December 18, 2018 Share Posted December 18, 2018 1 hour ago, ynot said: Thought I should add this tooth.... Carcharhinus species alternate symphyseal tooth is the most likely ID for this little tooth. Yeah, saw this on the other thread. Very interesting and unusual. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
ynot Posted December 18, 2018 Author Share Posted December 18, 2018 1 hour ago, Tidgy's Dad said: Very interesting and unusual. Thanks Adam. 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
BelemnBlues Posted December 29, 2018 Share Posted December 29, 2018 On 7/8/2018 at 10:43 PM, ynot said: Thought I should add these to this thread... Unidentified fish teeth (?) On 8/24/2018 at 9:22 AM, ynot said: And another one of these strange fish teeth... On 8/24/2018 at 9:36 AM, ynot said: Another fish tooth(?). Hi Tony, Really enjoying the great pictures of the Sharktooth Hill micros. Not sure if you got an ID on the unidentified teeth above. I think they are from younger examples of Heterodontus sp. (anteriors). I see you have identified examples of the adult anterior teeth of Heterodontus sp. in this thread. I haven't come across many examples of the younger age Heteorodontus teeth described in the literature but Welton and Farish's (1993) A Collector's Guide to Fossil Sharks and Rays From the Cretaceous of Texas has a nice illustration in Figure 12 of a series of modern Heterodontus dentitions showing not only how the teeth vary by position in the mouth but also how they vary by age, living up to its name in 2 ways. I don't think I can attach the figure due to copyright but might be able to send by DM if you don't have the reference. Thanks Luke 1 Link to comment Share on other sites More sharing options...
ynot Posted December 29, 2018 Author Share Posted December 29, 2018 2 hours ago, BelemnBlues said: Welton and Farish's (1993) A Collector's Guide to Fossil Sharks and Rays From the Cretaceous of Texas Sounds like a good reference. I would appreciate You PM Me the relevant pages. You can post the pictures here, just give credit to the source. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
BelemnBlues Posted December 30, 2018 Share Posted December 30, 2018 4 hours ago, ynot said: Sounds like a good reference. I would appreciate You PM Me the relevant pages. You can post the pictures here, just give credit to the source. Sent you a PM with the full figure and I attached an excerpt from figure 12 (pg. 15) of Welton and Farish's (1993) A Collector's Guide to Fossil Sharks and Rays From the Cretaceous of Texas (http://www.texassharks.org) that shows an illustration of a lower left dental series of a modern Heterodontus franciscanus from 3 life stages. I think your first 3 teeth look like those from the immature anteriors and the 4th is only partial so a bit more difficult to tell but probably more of a juvenile anterior of the same. I saw you had earlier posted an adult anterior which is usually the ones that are figured in the literature. Let me know what you think. 2 Link to comment Share on other sites More sharing options...
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