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WhodamanHD posted a topic in Fossil NewsFrom the Calvert Marine Museum Fossil Club Facebook page, our shark people may enjoy this next twist in the debate: ”Associated shark teeth from the whale collected in 2008. During the excavation a number of teeth were uncovered around the ribs. All of these teeth are from a tiger shark. The upper and lower positions are a proposed possibility. However, those of you who follow the ever confusing world of shark tooth identification, you’ll notice the “upper” teeth are ones identified as Galeocerdo aduncus and the “lower” teeth are ones identified as Physogaleus contortus. The
Hello everyone! I am going to share this rather confusing tooth. I found it under a section of cliff whose major tooth producer was likely Zone 12, definite Calvert Formation (which is early Miocene, creeping up on mid Miocene). It wasn’t found in situ, but the state of the tooth is almost perfect, leading me to believe it had worn out not long ago and likely not a trade tooth. Given this tooth without context, I would call it a Galeocerdo cuvier. But, given the context, this should be impossible, Cuvier are supposed to have arisen latest Miocene or early Pliocene. But this tooth i
Hey everyone, I have been trying to determine if my different tiger shark teeth are galeocerdo cuvier or aduncus, and it seems that every time I read identification guides/forums I just get more and more confused. Can anyone identify these and give me a good method of telling them apart? Too often I see that aduncus is smaller and thinner, but I am curious if there is a better way than size. Thank you very much!