rkfrace Posted July 25, 2020 Share Posted July 25, 2020 Hello all! Any insight on this unidentified fossil, from Hell Creek Formation, Montana, would be deeply appreciated. It was labelled 'cheek bone' by the original seller, but this looks nothing like the cheek bones that I own. Please see images. [P.S., this is the 3rd of 5 specimens that I'm posting for ID today; I deeply appreciate any insight that you can provide]. With gratitude, Ryan Link to comment Share on other sites More sharing options...
jpc Posted July 25, 2020 Share Posted July 25, 2020 I don't know what they mean by "cheek bone" There are a number of bones in the cheek. This is a piece of the squamosal, part of the frill. The riges are on the inside surface. 4 Link to comment Share on other sites More sharing options...
rkfrace Posted July 26, 2020 Author Share Posted July 26, 2020 22 hours ago, jpc said: I don't know what they mean by "cheek bone" There are a number of bones in the cheek. This is a piece of the squamosal, part of the frill. The riges are on the inside surface. Thanks, JPC. I'm assuming the seller meant the jugal or epijugal, but in any event your answer (squamosal) would make more sense. Do you happen to have an image that shows a comparative model? Finding images of the front of frill/squamosal specimens is easy; finding the backsides of them are much less so. The best example I found is below (from the Burke Museum), but even this photo muddies the waters for me rather than clarifying things (given all the nooks and crannies visible near the brain case, etc. Link to comment Share on other sites More sharing options...
jpc Posted July 26, 2020 Share Posted July 26, 2020 I think the ridges are behind the basiocciptal, which includes the occipital condyle. I will look at our Torosaorus skull at work and see if I can help you make sense of it. Yes, finding aninside view of the frill is difficult. 1 Link to comment Share on other sites More sharing options...
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