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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.
fossilsonwheels posted a topic in General Fossil DiscussionWe started working on two early forays into micro fossils over a year ago when we cracked open the vile of Permian matrix from Kansas. Those tiny Neva Formation formation fossils and the even older and smaller Genundewa Limestone fossils proved to be extremely challenging, sometimes very frustrating and all kinds of fun. The results were few shark fossils that made it from matrix to the safety of the display cases lol There were several lost or broken shark teeth and one pulverized to dust by a millimeter worth of thumb slippage. If we judged this by volume, one could say this was
From the album: Devonian Shark FossilsForgive the photo but I wanted to include this. This dermal denticle is an excellent match to Antarcticlamniformes denticles from several world wide locations and extremely similar to Wellerodus denticles from Givetian aged sharks from Cairo New York. I am completely comfortable calling this Wellerodus. We found a single tooth that appeared to be Wellerodus as well but have not photographed it. Wellerodus is classified as Antarticlamniformes.