Another Madagascar Theropod Tooth

[Dino Dad 81]

Hey all,

Curious to see if you have similar thoughts about this tooth. In terms of that possibility that it's not, in fact, from the Jurassic, I'm not sure I'm seeing the kind of denticle shape/hooking and marginal undulations of Majungasaurus.

 

• From Isalo IIIb in the Mahajanga basin of Madagascar
• CH: About 27.6mm
• CBL (carina-to-carina): 13.9mm
• CBW (mesial side to distal side): 7.5mm
• Mesial Serration Density: 2.2mmm
• Distal Serration Density: 1.9/mm

 

Thank you!

 

 

 

 

 

 

 

[Kikokuryu]

I'm pretty sure this is still Majungasaurus. The denticles appear to be quite worn, or broken off which is common in this deposit.

 

You may have just gotten a batch of Maevarano Formation material. Did you see any that didn't look abelisaurid, like a typical megalosaur/allosaur-type tooth like you'd see from Niger or El Mers?

 

Isalo theropod teeth are also common, but unlike the Maevarano which is 99% Majungasaurus, you should see a decent number of diverse and different indet. morphologies if you see them in a group as you'd expect from a Middle Jurassic deposit.

Edited April 14, 2023 by Kikokuryu