hemipristis Posted October 15, 2023 Share Posted October 15, 2023 (edited) Cow shark upper tooth. Hexanchus or Notorhynchus? Cow shark upper teeth baffle me Pliocene Yorktown Fm, Lee Creek Mine, Aurora, NC, USA. The foam square is 1 inch/2.54 cm Any thoughts or wisdom appreciated Edited October 15, 2023 by hemipristis 3 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
Ludwigia Posted October 15, 2023 Share Posted October 15, 2023 Apparently Notorhynchus teeth have coarse serrations on the mesial edge and Hexanchus have fine ones. 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
sixgill pete Posted October 17, 2023 Share Posted October 17, 2023 I would lean towards Notorhynchus on this. 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...
shark57 Posted October 18, 2023 Share Posted October 18, 2023 That tooth looks like it is from the Pungo River Formation. What makes you think it is Yorktown? What is it's size? Link to comment Share on other sites More sharing options...
hemipristis Posted October 20, 2023 Author Share Posted October 20, 2023 (edited) On 10/18/2023 at 3:37 PM, shark57 said: That tooth looks like it is from the Pungo River Formation. What makes you think it is Yorktown? What is it's size? The label Could be PR. I bought it on that big auction site and the ID had Yorktown. Size is 0.75 inch (1.9 cm) Edited October 20, 2023 by hemipristis 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
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