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Hi all, This eggshell fragment is from the Two Medicine formation in Browning, Montana. I'm trying to figure out if it's smooth enough to fall into the Troodon camp or if it's a worn down specimen that previously had ornamentation. I'm leaning towards Troodon eggshell with calcite coating. Thanks!!

Happy Holidays everyone, Any thoughts on what these ~8mm egg shells likely came from in the Two Medicine formation? Based on Eggs and Eggshell Fragments from the Upper Cretaceous Two Medicine Formation of Montana, I'm thinking hadrosaur.

Any thoughts on this tooth from the Two Medicine formation in Teton co, Montana? CH: 19mm CBL: 10mm CBW: 4mm Mesial serration density: about 4.5/mm Distal serration density: about 4.5/mm Apical hook on the few unworn distal denticles.

This topic is for information purposes of an experience I just encountered when looking at a Tyrannosaurid tooth on an auction site. You often see me request additional locality information when trying to ID a dinosaur tooth. I'm always concerned that the sellers provenance is not specific enough when it comes to material from Montana or Alberta to verify that the Formation provided is correct since it affects identification. Here is a good example of one case that paid off. In this case what was being offered for sale was several listings of Albertosaurus teeth from the Judith River Fm of Montana. I really liked the quality and color of the teeth so I followed up on one of them. I already knew the ID was wrong since no Albertosaurs have yet to be described from Montana so I needed to verify locality/formation.. Also the color was not typical of teeth from the JRF, a red flag. So I asked the seller about a locality beyond Montana and he immediately replied that the JRF was North Central Montana. I replied that I knew where the JRF was located but needed to understand where the tooth was found Town or County. He had to contact the digger and within a reasonable amount of time got back with me that it was Pondera County. Thats Two Medicine Fm different group of Dinosaurs. BTW seller was very helpful with no intention to deceive. Bottom line is that you need to do the best you can to verify what is being offered since you did not collect it yourself. Don't assume the ID or Formation provided is correct...Verify, verify as best as possible. Always request a town/county to be included in a provenance. If you can post interest here on the forum. Here is the tooth.