Bizarre Hell Creek teeth

[Dino Dad 81]

Hi all,

 

These two teeth came from the same seller and were put up for sale at the same time. They're so odd, that I thought it might be helpful to post them together since, if they come from the same animal, perhaps they provide more information as a pair than either would alone. Ricardo premax? Pterosaur? Acheroraptor?

• From the Hell Creek formation in Garfield, Montana
• CH: About 10mm (both)
• CBL: Tricky enough that I didn't measure, but can try if needed
• CBW: Tricky enough that I didn't measure, but can try if needed
• Mesial Serration Density: about 15/mm
• Distal Serration Density: about 15/mm (one of them is worn to the point of no serrations on one side, but the other side is about 15/mm, so I assume the missing side would have had serrations and been the same).
• Strong fluting on one or both sides.

 

Thank you!!

 

TOOTH 1

 

Possibly smooth side:

 

Ridges:

 

 

 

 

 

 

 

 

 

 

TOOTH 2

 

 

 

 

 

 

 

 

Edited January 20 by Dino Dad 81

[Dino Dad 81]

Champsosaurus?

[ThePhysicist]

Tooth 1: With the basal creases "fluting," carinae that extend the full length of the crown, and tiny serrations, my guess is a varanoid-like lizard like Palaeosaniwa or Parasaniwa:

^ image by @Troodon

 

[Troodon]

Yea looked at these yesterday and did some searching to no avail.   I dont think they are dinosaurian since they are not a match with the morphology of what is currently known. I looked at lizards and champso but fluting the length of the crown did not work.  Also, at least the first one looks more like a shed tooth with that clean formed base which would also exclude Champso and Lizards.    Whats left that might fit is Croc, could these be juvie Thoracosaurus teeth, dont know. 

 

@jpc Any thoughts?

[Dino Dad 81]

Thanks so much for giving it such attention, @Troodon.

Hope you're enjoying/will enjoy Tucson.

[jpc]

I also looked at this and had no answers worth mentioning.  Unlike troodon, I did not look into it any deeper.  So, my answer is... teeth... yes.  Let's go with mysterious reptile.