SharkySarah Posted October 26, 2020 Share Posted October 26, 2020 Fairly confident this is a P. contortus but would love a second opinion. From the Calvert formation. Link to comment Share on other sites More sharing options...
jpc Posted October 26, 2020 Share Posted October 26, 2020 P? what genus is P? Link to comment Share on other sites More sharing options...
Thomas.Dodson Posted October 26, 2020 Share Posted October 26, 2020 It could be P. contortus but it also seems possible it is Galeocerdo aduncus. This is hard to tell because the differences in serrations is hard to see on a worn specimen like this. The serrations on G aduncus get more coarse as they move towards the notch and form a more distinct distal notch. Some believe that P. contortus and G. aduncus are synonymous anyway so I wouldn't agonize over it too much. 1 Link to comment Share on other sites More sharing options...
Thomas.Dodson Posted October 26, 2020 Share Posted October 26, 2020 @jpc I believe she is referring to Physogaleus. Link to comment Share on other sites More sharing options...
SharkySarah Posted October 26, 2020 Author Share Posted October 26, 2020 @Thomas.Dodson do you think this could be a contortus or something else? The bottom is really worn Link to comment Share on other sites More sharing options...
Thomas.Dodson Posted October 26, 2020 Share Posted October 26, 2020 That looks more like a Carcharhinus sp. to me. It lacks a distal notch and the root is wrong for Physogaleus. Link to comment Share on other sites More sharing options...
Notidanodon Posted October 26, 2020 Share Posted October 26, 2020 The 2nd is a Carcharhinus the first is indeed a physogaleus as evidenced by the subtle twist in the blade Link to comment Share on other sites More sharing options...
Searcher78 Posted October 26, 2020 Share Posted October 26, 2020 The first tooth is a worn contortus. The second tooth is a Carcharhinus. Link to comment Share on other sites More sharing options...
Notidanodon Posted October 26, 2020 Share Posted October 26, 2020 Just now, Searcher78 said: The first tooth is a worn contortus. The second tooth is a Carcharhinus. Haha we posted that at exactly the same time Link to comment Share on other sites More sharing options...
Searcher78 Posted October 26, 2020 Share Posted October 26, 2020 1 minute ago, will stevenson said: Haha we posted that at exactly the same time It is always nice to get confirmation! 1 Link to comment Share on other sites More sharing options...
SharkySarah Posted October 26, 2020 Author Share Posted October 26, 2020 Oh gosh sorry the second photos were the wrong set. Supposed to be there. @will stevenson@Searcher78@Thomas.Dodson Link to comment Share on other sites More sharing options...
Searcher78 Posted October 26, 2020 Share Posted October 26, 2020 The second tooth looks more like a Galeocerdo. 1 Link to comment Share on other sites More sharing options...
Thomas.Dodson Posted October 26, 2020 Share Posted October 26, 2020 I agree, the latest tooth is Galeocerdo. 1 Link to comment Share on other sites More sharing options...
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