Hipockets Posted January 4, 2018 Share Posted January 4, 2018 This is from the Neuse River in NC. Eocene and Cretaceous. Scale is mm. Your thoughts ?Thanks Link to comment Share on other sites More sharing options...
sixgill pete Posted January 4, 2018 Share Posted January 4, 2018 I am thinking Archaeolamna kopingensis on this one, however I was debating between it and Carcharias samhammeri. 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...
non-remanié Posted January 4, 2018 Share Posted January 4, 2018 Scapanorhynchus. Probably a juvenile with exaggerated cusplets compared to adult teeth of the same position. ---Wie Wasser schleift den Stein, wir steigen und fallen--- Link to comment Share on other sites More sharing options...
sixgill pete Posted January 4, 2018 Share Posted January 4, 2018 6 minutes ago, non-remanié said: Scapanorhynchus. Probably a juvenile with exaggerated cusplets compared to adult teeth of the same position. Wondering what about this tooth tells you Scapanorhynchus. Not that I am disagreeing, I truly have difficulty identifying Cretaceous cusped teeth to some extent. But I honestly did not see Scapanorhynchus in this tooth. If this tooth comes from the site I believe it came from Scapanorhynchus is the most common tooth there, probably close to 50% of the finds. 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...
non-remanié Posted January 4, 2018 Share Posted January 4, 2018 24 minutes ago, sixgill pete said: Wondering what about this tooth tells you Scapanorhynchus. Not that I am disagreeing, I truly have difficulty identifying Cretaceous cusped teeth to some extent. But I honestly did not see Scapanorhynchus in this tooth. If this tooth comes from the site I believe it came from Scapanorhynchus is the most common tooth there, probably close to 50% of the finds. The shape of the cusplets, although perhaps a little disproportionate in size to adults is very much like some laterals. Another feature that I can point to is in pic3. At the border between the main lingual crown and the root, I can see faint remnants of wrinkles, just at the base. That's a common feature of laterals and post-lats. But that feature is often obscured by abrasion and reworking. It's not obvious in the picture, but that's exactly what it looks like to me. Nutrient groove is correct for Scapanorhynchus and importantly, from Hipockets recent posts, I figured Scapanorhynchus was in play. Although the root is pretty worn, Id say the root is not the right shape for samhammeri and the cusplets are quite different than archaeolamna. 1 ---Wie Wasser schleift den Stein, wir steigen und fallen--- Link to comment Share on other sites More sharing options...
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