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ID help with some Cretaceous Shark teeth


fossilsonwheels

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These will all be from the Mesaverde Formation, Colorado. 

 

First up is a 1mm tooth that sure looks like an anterior Heterodontus tooth to me. I am open to any ID suggestions but I see a lot of similarities with the Atco tooth I recently found. 

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I think this one is a Sand Tiger and not a Goblin. It’s 4mm. I think it could be Carcharias but I am not sure. 

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Another that I believe is Sand Tiger though I suspect possibly Odontaspis. 4mm. 

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Here is one that I am totally stumped on. No clue. Obviously not complete but I don’t have any suggestions to make. A bit larger at 10mm or so. 

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Symphseal Sand Tiger ? It’s not a Goblin symphseal. I’ve found one of those. Though not complete I did see similar teeth referred to as Sand Tiger. 

6EBCC038-540F-4BE9-8F8D-254C7C0BAF23.jpeg

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