Dino Dad 81 Posted December 5, 2022 Share Posted December 5, 2022 Hey all, With the denticles being so worn off this one, I'm wondering if general morphology can confidently ID Dromaeosaurus. It's a tooth I'd normally assume is anterior, but, if it is Dromaeosaurus, I'm not sure I'd be able to tell. Judith River formation, North Central Montana CH: 12mm CBL: 5.5mm CBW: 3mm Mesial serration density: about 6?/mm Distal serration density: about 5.5/mm Link to comment Share on other sites More sharing options...
Troodon Posted December 5, 2022 Share Posted December 5, 2022 Not a clean call would say > 70% chance it is one. Provenance is not the best. DSDI a bit high 1 Link to comment Share on other sites More sharing options...
Dracarys Posted December 5, 2022 Share Posted December 5, 2022 @Troodon Would a dromie tooth have such a robust cross sectional base? Would this not be a juvie tyrannosaur tooth? My thoughts. Link to comment Share on other sites More sharing options...
Troodon Posted December 5, 2022 Share Posted December 5, 2022 6 minutes ago, Dracarys said: @Troodon Would a dromie tooth have such a robust cross sectional base? Would this not be a juvie tyrannosaur tooth? My thoughts. What do you exactly mean by robust of the base? Its fat oval shape? Link to comment Share on other sites More sharing options...
Dracarys Posted December 5, 2022 Share Posted December 5, 2022 4 minutes ago, Troodon said: What do you exactly mean by robust of the base? Its fat oval shape? Yes, exactly. I thought type of base would speak against a dromie. Link to comment Share on other sites More sharing options...
Troodon Posted December 5, 2022 Share Posted December 5, 2022 Always a challenge to ID these teeth, its not easy. The base of these teeth are unfortunately very typical to Tyrannosaurids. I included some illustrations of Dromie bases in the attached topic. One characteristic to aid in differentiating them from Tyrannosaurids take a look at where the lingual twist starts. On Dromie teeth they typically begin very close to the tip while Tyrannosaurids should start lower. Dromaeosaurus teeth are unlike most other Dromaeosaurids. They are not compressed, have a lingual twist and lateral teeth should have distal densities higher than mesial ones. Link to comment Share on other sites More sharing options...
Dracarys Posted December 5, 2022 Share Posted December 5, 2022 4 minutes ago, Troodon said: Always a challenge to ID these teeth, its not easy. The base of these teeth are unfortunately very typical to Tyrannosaurids. I included some illustrations of Dromie bases in the attached topic. One characteristic to aid in differentiating them from Tyrannosaurids take a look at where the lingual twist starts. On Dromie teeth they typically begin very close to the tip while Tyrannosaurids should start lower. Dromaeosaurus teeth are unlike most other Dromaeosaurids. They are not compressed, have a lingual twist and lateral teeth should have distal densities higher than mesial ones. Thank you as always for the information. Interesting to find they are more different than other dromaeosaurids. Wonder why? Link to comment Share on other sites More sharing options...
Troodon Posted December 5, 2022 Share Posted December 5, 2022 6 minutes ago, Dracarys said: Thank you as always for the information. Interesting to find they are more different than other dromaeosaurids. Wonder why? Well, is it classified properly ? ? ? 1 Link to comment Share on other sites More sharing options...
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