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I have done this periodically on the forum with quite a bit of success so I thought we would try it again. I am working on going deeper into shark evolution in our programs and expanding the range of sharks we cover by a few million years. We are set with our Cenozoic and Mesozoic sharks but we are still tinkering with the Paleozoic sharks. Currently the goal is extending the timeline backward and covering the very early sharks. Our earliest shark fossils were 340 million years old but we have been able to find a few that are older and really help us but I am wondering if we can find more. We recently acquired some Chondrichthyes scales from the Harding Sandstone. While likely not "true" shark scales, they are a link in the chain which is what we need. I think this was a good starting point. We also picked up a Diplacanthus fossil from Scotland which gives us a nice example of what the ancestors of sharks were and again provides us with another link in the chain. Carter and I both thought these were fossils we needed to add to really show the kids shark evolution through the fossils. We also picked up some micro fossils from the Genudewa Limestone of New York which should provide some interesting shark material. This formation is the same age (Givetian) and same general location (New York) as the formation that Wellerodus is described from. There are teeth and denticles that are at least superficially pretty close to those of Wellerodus. This is probably our best shot at finding shark fossils that could potentially be from Antarticlamnidae. I know there are also teeth found in these micros that look Cladodont in nature as well. Outside of these micro fossils, I am coming up blank on Devonian shark fossils. I have been researching the heck out of Paleozoic sharks and I know the Devonian stuff is rare but I have seen a little bit in collections so in my mind it might be possible to add a tooth or some denticles from other formations. Obviously we are not looking for a full shark fossil from the Cleveland Shale or anything like that but I believe we can scrounge up some additional fossils from the Devonian. None of my usual sources have turned up any material at all so we need a push start here lol So TFF friends, share your knowledge with us if you can. What, if any, options are there as far as Devonian shark teeth or denticles that appear on the market ? Are there formations that we should look into that people collect from? Basically any information that we can get might be helpful. The goal is filling in that timeline of sharks and we have a bunch of shark programs this winter and spring so this is the collecting priority for us. Thank you in advance for any and all replies !