John S. Posted June 20, 2017 Share Posted June 20, 2017 Found this large Ptychodus in a creek running through Eagle Ford Group(86-92 mya). Could it be Rugosus? Max size is 46 mm, this one is 40.6 mm/1.6 in. Thanks! North Central Texas Eagle Ford Group / Ozan Formation Link to comment Share on other sites More sharing options...
fifbrindacier Posted June 20, 2017 Share Posted June 20, 2017 Well, i'm not at all an expert in tooth, but your might find help here : http://oceansofkansas.com/ptychodus2.html ; http://www.elasmo.com/frameMe.html?file=genera/cretaceous/ptychodus.html&menu=bin/menu_genera-alt.html ; and also here, on that forum : http://www.thefossilforum.com/index.php?/topic/14530-ptychodus-id-quick-guide/ 1 "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
siteseer Posted June 21, 2017 Share Posted June 21, 2017 It looks more to me like a P. mortoni with a lot of wear. I would think that a P. rugosus with that much wear would be unrecognizable. 1 Link to comment Share on other sites More sharing options...
John S. Posted June 21, 2017 Author Share Posted June 21, 2017 Thanks for info guys! Not sure if I've ever found a Rugosus North Central Texas Eagle Ford Group / Ozan Formation Link to comment Share on other sites More sharing options...
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