jikohr Posted April 6, 2022 Share Posted April 6, 2022 Hi everyone! This came from Powder River County, Montana Hell Creek Formation. CH is 12 mm (I think, not sure where the root begins.) CBL is 5 mm CBW is 2 mm no serrations on the mesial side but there are some on the distal side but only in the middle and not near the tip. The density is 7/mm. I have a two others like this I'll try and post pics of later. one other has full serrations on the distal side (7/mm) and some very light serrations at the base of the mesial side (7/mm) and another that's fully serrated on both sides (7/mm on both sides) Other than that the teeth are nearly identical right down to a D shape cross section and overall shape which is supposed to mean Tyrannosaur but these don't look like Nano or rex. What are these? Link to comment Share on other sites More sharing options...
Carl Posted April 6, 2022 Share Posted April 6, 2022 (edited) This is a Paronychodon tooth. They are generally seen as theropod teeth, but a surprise might be coming down the road as to the ID of these things... Edited April 6, 2022 by Carl 2 1 Link to comment Share on other sites More sharing options...
Troodon Posted April 6, 2022 Share Posted April 6, 2022 Its serrated, so I would described it as a premaxillary tooth of a Dromaeosaurid. Most theropod paleontologists, I believe view Paronychodon, a tooth taxon, as not valid and I'll point to Evans/Currie paper 2019 showing this morph present on premax teeth of Saurornitholestes and Velociraptor. 1 Link to comment Share on other sites More sharing options...
jpc Posted April 6, 2022 Share Posted April 6, 2022 Hey troo... can you share that paper? Link to comment Share on other sites More sharing options...
Troodon Posted April 6, 2022 Share Posted April 6, 2022 18 minutes ago, jpc said: Hey troo... can you share that paper? Saurornitholestes Skull.pdf 1 Link to comment Share on other sites More sharing options...
jpc Posted April 6, 2022 Share Posted April 6, 2022 Thanks Link to comment Share on other sites More sharing options...
jikohr Posted April 6, 2022 Author Share Posted April 6, 2022 5 hours ago, Troodon said: Its serrated, so I would described it as a premaxillary tooth of a Dromaeosaurid. Most theropod paleontologists, I believe view Paronychodon, a tooth taxon, as not valid and I'll point to Evans/Currie paper 2019 showing this morph present on premax teeth of Saurornitholestes and Velociraptor. Thanks! I figured from the get go it wasn't Paronychodon since by definition that thing has no serrations, but I wanted to be sure. I've been seeing a lot of "Paronychodon" teeth for sale that wind up being this morphology. I have seen and acquired one from hell creek that fit the actual Paronychodon morphology with the lines and no serrations. Link to comment Share on other sites More sharing options...
jikohr Posted April 6, 2022 Author Share Posted April 6, 2022 Here's another one as an example Link to comment Share on other sites More sharing options...
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