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Found 4 results

  1. 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.
  2. ThePhysicist

    Chondrichthyan? denticles

    From the album: Harding Sandstone

    Chondrichthyan? denticles Tezakia hardingensis Harding Sandstone, Canyon City, CO, USA These are possible Ordovician Chrondrichthyan (class of cartilaginous fish including sharks) denticles, if true, these would be the earliest known. Described by Andreev et al. (2015) and Sansom et al. (1996) ^Andreev et al. (2015)
  3. ThePhysicist

    Orthacanth shark denticles and spines

    From the album: Permian

    These sharks would not be fun to pet.
  4. ThePhysicist

    denticles

    From the album: Post Oak Creek

    A collection of denticles from sawfishes and possibly sharks.
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