Hadrosaur Tooth

[Goldkaiser]

Hi guys I recently got sent a package from some friends for my birthday which included some nice little goodies including tickets to see the Dinosaurs of china event in Nottingham this summer, Included was this lovely piece identified as purely teeth and bone from a Hadrosaur which was found in the Lance Formation, I was just trying to get any information regarding a species level is possible? I'm not entirely sure if this is possible but hopefully you guys familiar with the lance formation fauna may help. Many thanks,

Chris.H  

[Goldkaiser]

Below are a few images of the whole piece and side view showing one of the broken teeth.

[Susan from PA]

Nice tooth!  

 

Im more familiar with the Hell Creek Formation than the Lance Formation, but since they are around the same age, at the end of the Cretaceous, I would say this tooth belongs to Edmontosaurus  annectens.    If I'm wrong, someone will be by to correct me shortly! .  

[Goldkaiser]

16 minutes ago, Susan from PA said:

Nice tooth!  

 

Im more familiar with the Hell Creek Formation than the Lance Formation, but since they are around the same age, at the end of the Cretaceous, I would say this tooth belongs to Edmontosaurus  annectens.    If I'm wrong, someone will be by to correct me shortly! .  

 

Many thanks Susan for taking a look and I must say I'm happy with the tooth it has some lovely detail  

[Troodon]

Hi Cris, nice block full of goodies.  Just to add to what Susan said it's a maxillary tooth which are a little different than dentary ones.   The fauna in the Lance is basically identical to that in the Hell Creek.  Enjoy.

[jpc]

1 hour ago, Troodon said:

Hi Cris, nice block full of goodies.  Just to add to what Susan said it's a maxillary tooth which are a little different than dentary ones.   The fauna in the Lance is basically identical to that in the Hell Creek.  Enjoy.

troodon... how are uppers different form lowers?  

[Troodon]

6 hours ago, jpc said:

troodon... how are uppers different form lowers?  

 

On Edmontosaurus type teeth:

  Your dentary tooth is the classic hadrosaurid diamond shape, full crown and a high center ridge that goes to both ends.  

 Your maxillary teeth typically have a curve (fold) inward at the distal end, a partial low center ridge and not a full crown, a root at one end.  Some maxillary teeth like Goldkaiser's specimen also have denticles on the tip, see red arrow.  There are so many teeth in these jaws that some configurations may be difficult to diagnosis, my disclaimer    

 

I always work better with pictures so here are a few to help.

Comparison of dentary and maxillary teeth

 

Denticles easily visible

 

Maxilla

 

Dentary

[Susan from PA]

Thanks for the explanation @Troodon! Now I have to go and check all of my Edmontosaurus teeth!