debivort Posted July 9, 2022 Share Posted July 9, 2022 Thanks for any thoughts on the species here. Link to comment Share on other sites More sharing options...
ThePhysicist Posted July 9, 2022 Share Posted July 9, 2022 First looks like an extinct white shark (Carcharodon hastalis), but could be a mako lateral (?). Second looks like a small Parotodus benedeni. 2 Forever a student of Nature Link to comment Share on other sites More sharing options...
Darktooth Posted July 10, 2022 Share Posted July 10, 2022 The Parotodus is a great find! 1 I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
debivort Posted July 10, 2022 Author Share Posted July 10, 2022 15 hours ago, ThePhysicist said: First looks like an extinct white shark (Carcharodon hastalis), but could be a mako lateral (?). Second looks like a small Parotodus benedeni. I think A is a pretty good match to L2 of the Isurus retroflexus narrow dentition here: http://www.elasmo.com/genera/reconstruct/the_recon.html http://www.elasmo.com/genera/reconstruct/retro_narrow/pics/py145i-ss.jpg Link to comment Share on other sites More sharing options...
ThePhysicist Posted July 11, 2022 Share Posted July 11, 2022 9 hours ago, debivort said: I think A is a pretty good match to L2 of the Isurus retroflexus narrow dentition here: http://www.elasmo.com/genera/reconstruct/the_recon.html http://www.elasmo.com/genera/reconstruct/retro_narrow/pics/py145i-ss.jpg Could be, it's difficult for me to say for sure without the complete root: 1 Forever a student of Nature Link to comment Share on other sites More sharing options...
debivort Posted July 11, 2022 Author Share Posted July 11, 2022 1 hour ago, ThePhysicist said: Could be, it's difficult for me to say for sure without the complete root: Agreed - Thanks for putting the two possibilities side by side. I think the side view might be closer to hastalis, where the thickness of the blade decreases rather linearly from root to tip. In retroflexus, it gets thinner rapidly near the root and then stays a similar thickness until the tip. Also, what remains of the root looks less "crested" in the side view, closer to hastalis than retroflexus. I think your original guess is holding up. Link to comment Share on other sites More sharing options...
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