Hi I have had this Hell Creek tooth that was previously ID as Dromaeosaur (possibly Dakota Raptor) for a while and the other day I decided to get my magnifying camera out to take a deeper look at the specimen as I have heard that some Dromaeosaur and small Nanotyranus teeth can be quite challenging to tell apart from one another. These are the close up pics of the specimen that I am still a little unsure about:
Mesial side with serration showing a little carinae twist
Distal side with straight carinae that stretches down to the base of the tooth in straight line:
Cross-section looks a little rectangular with what seem like a small pinch on the sides?
From the initial observation under the scope it does seem like this could be a Nanotyranus tooth instead of a Dromaeosaur but I would like to hear the experts thought and input on it just to be sure. Thanks in advance!