Dimetrodon teeth ?

[Brevicollis]

Hello, I saw these Dimetrodon teeth for sale today and wondered If they are really ones.

Im pretty sure that two of them are Dimetrodon, but the three other teeth look more like something amphibian to me.

Teeth sice 7/16 to 1/8 inch

Wellington formation, Ardmore, Oklahoma.

 

The teeth incircled in red are the teeth im sure that they're Dimetrodon.

Thanks !

[JamieLynn]

Following to see what kind of info is offered up. I too have been trying to determine what is dimetrodon vs. amphib.  The big one definitely looks like what I would say is Dimetrodon, it seems to have serrations on the edges.

[ThePhysicist]

Unfortunately the images aren't great for ID'ing the small ones, would like to see more detail. The only one I can confidently ID is the largest, and I agree it's Dimetrodon. 

 

General features to look for in Dimetrodon teeth include basal constriction, fluting, labio-lingual compression, and carinae (serrations may or may not be present - depends on the species). 

 

cf. D. limbatus dentary:

Brink, K., Reisz, R. Hidden dental diversity in the oldest terrestrial apex predator Dimetrodon.Nat Commun 5, 3269 (2014). https://doi.org/10.1038/ncomms4269