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Hello, Just purchased some Permian matrix bags from Richards Spur, OK and the Texas Red Beds. I have a few items I'm wondering if anyone can help me ID. I do have some guesses for a few of them. Using a dime for scale. Red Beds Going to guess Eryops skull fragment on this one. I think these might be fragments of Orthacanthus spines. Partial vert? This one is so small I really can't capture any distinct detail in the photo. Most small teeth fragments in this matrix were the broken tips of Orthacanthus teeth. However this is much rounder (although I can make out at least one edge), has no serration as far as I can tell, and under a very bright light I can see extremely fine vertical ridges (striae?) down the length of the tooth. It is also colored differently. Not hoping for much on this guy but my best guess would be some sort of amphibian. This one I'm fairly confident is an Archeria "jaw"; I understand they would have had some kind of palate plate to help grasp/swallow prey? More info on that would be awesome. It definitely matches what I've seen on Google. Richards Spur, OK Am very interested in this one in particular. Some kind of rooted tooth, it has this strange acorn shape to it. Not seen anything like it elsewhere. Thanks for having a look and my apologies for the poor photos; all I've got is a magnifying glass. I think I need to buy a book so I can try and identify this stuff on my own!

MacDougall, M.J., Tabor, N.J., Woodhead, J., Daoust, A.R. and Reisz, R.R., 2017. The unique preservational environment of the Early Permian (Cisuralian) fossiliferous cave deposits of the Richards Spur locality, Oklahoma. Palaeogeography, Palaeoclimatology, Palaeoecology, vol. 475, pp.1-11. https://www.researchgate.net/profile/Mark_Macdougall2 https://www.researchgate.net/publication/313589380_The_unique_preservational_environment_of_the_Early_Permian_Cisuralian_fossiliferous_cave_deposits_of_the_Richards_Spur_locality_Oklahoma?ev=prf_high http://www.sciencedirect.com/science/article/pii/S0031018217301669 Yours, Paul H.