Fossil ID help: Rex and Spino tooth tips

[Praefectus]

Hello. A friend of mine has a fossil tyrannosaur and spinosaur tooth and was looking to confirm the identification. Unfortunately, he doesn't have much locality information. 

 

First, the tyrannosaur tooth. He says it comes from around Red Deer, Alberta. No other information. 

 

 

Next the spino tooth. Comes from "Morocco, I think." Is it spinosaurid? The tooth doesn't have the usual Kem Kem colors. 

 

 

Thanks for your help. 

 

[gigantoraptor]

First does look Tyrannosaurid but don't know for certain.

 

The second tooth does not look like Spinosaurid to me.

Assuming this is from the Kem Kem beds, this looks like a specific variant of croc tooth. I haven't seen too many of these and  I'm curious to know how big it is. Below is one of mine. I don't think there is an official species described from the Kem Kem but they look a bit like Kaprosuchus from Niger.

 

[Troodon]

Well its certainly a Tyrannosaurid tooth given its size but the question is can you determine if its from the Scollard Fm.   Does Red Deer mean the town or the river which goes through many different formations.

 

The second tooth looks more like croc given its curvature 

Very rough map

[Troodon]

Let me add the tooth is big and does have the size to be Trex given its only a partial tooth.   We can see if the serrations give us a clue.  Do a count 5 mm on that distal edge where they are visible.  Also size.    BTW its an anterior dentary tooth.  

[Praefectus]

Thanks for the help. The "spino" tooth is approximately 5 cm. The tyrannosaur tooth was found along Red Deer river. 

[Troodon]

That makes an ID harder and most likely an Albertosaurus 

[Dracorex_hogwartsia]

5 hours ago, gigantoraptor said:

First does look Tyrannosaurid but don't know for certain.

 

The second tooth does not look like Spinosaurid to me.

Assuming this is from the Kem Kem beds, this looks like a specific variant of croc tooth. I haven't seen too many of these and  I'm curious to know how big it is. Below is one of mine. I don't think there is an official species described from the Kem Kem but they look a bit like Kaprosuchus from Niger.

 

I thought I had seen every type of tooth from Morocco but I don't know if I've seen one like this. This is a croc tooth? It's in beautiful condition!

[BellamyBlake]

If that's a Moroccan Croc tooth, then I want one haha

[Praefectus]

Hi. Sorry for the slow update. I got some close-up pictures of the serrations on the tyrannosaur tooth. It has about 8 serrations per 5 mm. 

 

 

 

 

[Troodon]

A 2014 study of Albertosaurus teeth by

Currie et al reported the distal density of 1.5 to 3/mm in the study group which is consistent with this tooth.  So given it was found along the Red Deer River its reasonable to believe the likelihood of this being Albertosaurus is high.

[LabRatKing]

I tried a 5mm count and my math says yes. As for spino  tooth, well I am leery of anything from Morocco.