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Showing results for tags 'arch'.
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From the album: Coastline of the Crackingon Formation.
Although not part of the Crackington formation -
Dear Fossil forum members, I have recently acquired this bone. It is said to have been found at Mack, Colorado. I suppose it is from the Morrison Formation. The previous owner thought it might be a Stegosaurus neural arch, but now I have it in my hands I see more similarities with a supraoccipital. Especially these: (Eolambia, A and C) https://peerj.com/articles/1872/ (Fig. 12, A. Eotrachodon) https://www.nature.com/articles/s41598-019-41325-8 (Fig. 2, Q, R, S, T and their other sides, unknown hadosaurs) seem similar to me. That would indicate that my bone is probably Camptosaurus dispar, which is the closest animal to hadrosaurs to live in the Morrison Formation. However, I have not found a good comparison with Camptosaurus, nor any other Morrison Formation dinosaur. In comparison with the supraoccipitals shown above, mine is more than twice the size. Mine is about 12cm, while the other ones I found are 4 to 6 cm according to their scale bars. Is this bone a bit similar in every dinosaur or do I have a really large specimen of Camptosaurus in front of me? I hope someone can help me with this, Thank you very much in advance for your answer, Kind regards, Sander