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Showing results for tags 'greenhorn limestone'.
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Recently I purchased these two Squalicorax sp. tooths from an auction website and both are currently on the way. I have a few questions about identification since I know very little about shark tooths and also please correct any misidentifications. Seller A sold me this tooth and it was listed as Squalicorax hartwelli. It is collected from Niobrara formation in western Kansas. Is Squalicorax hartwelli considered a variation of Squalicorax falcatus? Do you agree with seller A's identification above? Seller B sold me this tooth and it was listed as Squalicorax kaupi. It is collected from Lincoln Limestone member of Greenhorn Limestone formation. I suspect this tooth is misidentified and it should be Squalicorax falcatus, a paleobucket taxa for Squalicorax sp. variations. I thought Squalicorax kaupi is found from Santonian to Maastrichtian and Lincoln Limestone member is Cenomanian. I spent quite a bit looking up on here and Ocean of Kansas website comparing Squalicorax sp. tooths before posting! Although I am more confident in some of the members' identification skills than I am with mine. Regardless of identifications (or misidentifications), I am happy with both and is excited to have them arrive soon!
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- squalicorax sp.
- squalicorax
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I have a few Ptychodus teeth that have no definitive ID and I’d like to change that. I’ve been researching them. I used the great Ptychodus guide on TFF, the Oceans of Kansas website and Shawn Hamms paper. I was able to comfortably ID 2 of the unknowns. Even with all the great information available, I am still not sure on a few. First one is from the Greenhorn Limestone in Kansas. This one has me stumped. I thought it was a good match for P. polygrus but I found nothing indicating that it was present in the Greenhorn. It has been found in Kansas but I only found references for it in other formations. A small tooth, at right around 1cm wide.
- 16 replies
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- ptychodus teeth
- greenhorn limestone
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