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All of these items are from the same dealer and I am looking for some ID help. I researched these as much as I could on my own but I can only get some far with the knowledge I have. All of these come from the Judith River formation. For our education programs to really be solid, we need to expand beyond just teeth. We do have an Edmontosaurus jaw fragment and will soon have some Ceratopsian frill pieces plus some bones fragments from the Morrison Formation. I think it would be a good idea to augment the small dromaeosaurid teeth we have a bone or two so I am trying to understand this part of dinosaur collecting better before I make a purchase. I do not want to repeat the error I made with the Troodon vert (which did have a happy ending as the dealer graciously agreed to exchange that for a frill piece). Any help on this is greatly appreciated. The first one is listed as a the pedal phalanx from a Dromaeosaurus. I looked over as many photos as I could find of dromaeosaurid phalanx bones. It does look similar to several photos I found. I have a few questions on this one. Is this the phalanx of a dromaeosaurid dinosaur ? Second question is more of a general question. Can you even determine a genus or species based on an isolated phalanx? The second one is listed as a distal caudal vertebra of a Dromaeosaurus. This one was far more difficult to find anything to reference on the internet. I found nothing that could give me an insight as to whether or not this is a dromaeosaurid vertebra. Is this is from a dromaeosaurid dinosaur or any kind of theropod for that matter ? I have a pretty good idea now of what to ask dealers when it comes to theropod teeth but isolated bones are pretty new to me. Are there questions that I can ask of the dealer to further the ID process? Thank you in advance for any assistance you can provide