old bones Posted June 16 Share Posted June 16 I am in need of some help with ID’s on these three shark teeth from the beaches of South Carolina. I think that 1 and 3 might be a species of Isurus, but I have trouble with shark teeth… Number 2 is unlike any I have ever found at the beach with that little cusplet. All help is appreciated. 1 Link to comment Share on other sites More sharing options...
Fin Lover Posted June 16 Share Posted June 16 (edited) I would say the first one is likely angustidens, second one hastalis, and either another hastalis or an Isurus for the third...I have trouble telling those two apart in pictures. I can't tell for sure if it has a worn enamel ledge on the third one (labial side), but I think I see one. If so, I. retroflexus. Edit: Sorry, I just realized the pictures were out of order. I went based on position in the post, not the number. Edited June 16 by Fin Lover 2 Fin Lover Link to comment Share on other sites More sharing options...
old bones Posted June 16 Author Share Posted June 16 21 minutes ago, Fin Lover said: I would say the first one is likely angustidens, second one hastalis, and either another hastalis or an Isurus for the third...I have trouble telling those two apart in pictures. I can't tell for sure if it has a worn enamel ledge on the third one (labial side), but I think I see one. If so, I. retroflexus. Edit: Sorry, I just realized the pictures were out of order. I went based on position in the post, not the number. Thanks so much @Fin Lover. I didn't mean for the pictures to be out of order, but no biggie, I understand your answer. Even though it is beat up, I am pleased with the angustidens as I don't think that I have ever found one before. As for the other two, I realize that they are worn enough to make positive ID difficult. I do believe that (in hand), there is that enamel ledge just barely there to indicate I. retroflexus. Link to comment Share on other sites More sharing options...
Fin Lover Posted June 16 Share Posted June 16 Retroflexus was my first thought, but I have answered incorrectly on a couple of hastalis that I IDed as Isurus, so I understand that's my weakness. Very nice hastalis, though. They are like the GWs here in that they often don't have complete roots. I think that's why I have an issue IDing hastalis...I rarely find them with any root. The cusp on the angustidens is small but I think it would have been much more obvious before the serrations wore off. You can find megs here but chubs are rare. Angustidens are most likely and can have a very wide range on the cusp size and shape. Fin Lover Link to comment Share on other sites More sharing options...
hemipristis Posted June 17 Share Posted June 17 Concur with #3 as retroflexus 1 'Those who cannot remember the past are condemned to repeat it.' George Santayana Link to comment Share on other sites More sharing options...
old bones Posted June 17 Author Share Posted June 17 3 hours ago, Fin Lover said: Retroflexus was my first thought, but I have answered incorrectly on a couple of hastalis that I IDed as Isurus, so I understand that's my weakness. Very nice hastalis, though. They are like the GWs here in that they often don't have complete roots. I think that's why I have an issue IDing hastalis...I rarely find them with any root. The cusp on the angustidens is small but I think it would have been much more obvious before the serrations wore off. You can find megs here but chubs are rare. Angustidens are most likely and can have a very wide range on the cusp size and shape. Thank you very much @Fin Lover for the help and concise explanation. 23 minutes ago, hemipristis said: Concur with #3 as retroflexus Thank you @hemipristis for your confirmation! 1 Link to comment Share on other sites More sharing options...
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