Dromaeosaurus tooth?

[Dino Dad 81]

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

 

 

 

 

 

 

 

 

[Troodon]

Not a clean call would say > 70% chance it is one.

Provenance is not the best. 

DSDI a bit high

[Dracarys]

@Troodon Would a dromie tooth have such a robust cross sectional base? Would this not be a juvie tyrannosaur tooth? My thoughts. 

[Troodon]

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?

 

[Dracarys]

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. 

[Troodon]

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. 

[Dracarys]

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? 

[Troodon]

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 ? ? ?