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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 is the spitting image of a G. cuvier and exceeds the size of any G. aduncus I have seen. I’ve shown it to a few seasoned collectors, and they can’t think of one of this size either. I only know of one tooth which approaches it from this area, and it does share the cuvier look, and I’ve just asked the owner what he thinks. What do you guys make of this tooth? First gasps of cuvier or is this just what aduncus start to look like when they get massive? Tooth dimesions: slant height: between 1 and 1 1/10 in Width: 9/10 in I apologize for the lack of natural light.

Hello. I purchased some tiger shark teeth and was hoping to get some ID help. The teeth come from various locations in Florida. The largest tooth is 1.25 inches (~3.2 cm). All the teeth have complex serrations. I believe the first row (#1-6) come from Galeocerdo mayumbensis. I am unsure about the second row and think they may be either Galeocerdo cuvier or Galeocerdo mayumbensis. Below are front and back pictures of the teeth. Thanks for any help.

I found this his big tiger shark tooth at a local rock shop today. The tag says Eocene but no location info is provided and the store worker had no idea. It looks modern, but the enamel has chipped back a bit as if fossilized. Was wondering what you guys thought? cheers!

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!