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Hello! Over the past half year I have been collecting shark teeth on the Belgian north sea coast from dredged sand. I have gathered the ones that are complete and identifiable to figure out specifics but the mackerel sharks prove difficult. Luckily I have a page with multiple species from the specific beaches and deposits I visited. (Onderkaak = lower jaw, Bovenkaak = upper jaw). However, this does not include all of the possible species. Many are from the ypresian, the vast majority are eocene of course. This should narrow it down immensely already. My resources are limited though. I have front-back views of my teeth collected and have given them numbers for easy differentiation. I’ve also tried to sort similar ones together. I think most of them could be striatolamia macrota but there are subtle root shape and tooth size differences that I have 0 experience with. I hope more knowledgeable shark enthusiasts here can help with this. I also added some quick side views to showcase that no. 1 and 11 do have a curve to them whereas most of the others are either perfectly flat or pointing slightly up (when lying down with the flatter side underneath). With eocene shark teeth ID, my biggest issue is always not knowing if tooth differences are merely related to placement in the mouth, or if they are actually differences between species. I will provide closeup sideviews of specific teeth if necessary for ID.

Hello, it has been a long time since I was on the Forum; glad I finally have time from work for it. I have found one site here in Wyoming where I find Hybontid (don't know if I spelled that right) and only a couple examples of other types. A possible site that I have really been wanting to check out is on a ranch just west of me and after asking about once per year the owner at last caved in and let me look. I normally look for dinosaur related material and that is what I was expecting here. As I was walking to the area I wanted to check out I came across an exposure of sandstone and it has a layer of shells and gastropods running through it. I did not go to find that types of fossils so I looked real quick and moved on. I did find one shark tooth in this spot. I got to the site; and found nothing. I could not believe it. So, I went and followed strata that I found the shells and shark tooth and started finding more stuff. Shark teeth lying on the ground and just eroding out of the sandstone. I found some really nice oyster shells, few snails and mixed in were a few pieces of bone and other stuff. I found one block of rock that was loaded with fossils and there was a Mosasaur tooth in that had been exposed for a long time and was in a lot of pieces. It was more than 2" long but the only part still completely intact was the tip. There were four nice long straight ammonites there also with the biggest being about 8" long. Enough rambling. I will post some of the pics of the first day I was there, I found 17 but will only show a few.