Aguja formation tooth

[gturner333]

I found this tooth from the Aguja formation, Brewster County, Texas. I believe it is some sort of fish, but not sure. Any ideas? Hash marks are in mm. Thanks

[Coco]

Hi,

 

Age ? I can't help you but I have some teeth looking this one from Purbeckian (Tithonian/Berriasian -> Cretaceous). I am interested in this ID.

 

Coco

[Al Dente]

Might be a fish tooth but I think it is a tiny croc tooth. 

[Troodon]

The Aguja is similiar to that of the Judith River Formation which was used to compare against your specimen.   Two potential candidates are represented in that fauna a fish and alligatorid.

 

The fish:

Paralbula sp. (R, S) photo but yours looks like it has a cutting edge and has a higher crown. 

 

 

The alligatoroid seems to be a better fit.  The cutting edge and crenulation appears similiar.

Brachychampsa sp. is described in the Judith.

 

[Jesuslover340]

Given the potential candidates for the fauna, I'd support alligatorid. See image 16 (a posterior tooth from Alligator mississipiensis) in this link for comparison:

 

I've also taken the liberty to take some pics of the posterior teeth on a saltwater crocodile skull in my possession for further comparison  :

 

[Al Dente]

Here's a 4mm long tooth that may be Brachychampsa from North Carolina. This one is from the Campanian Black Creek Group.

[gturner333]

Looks like alligatorid to me also. Thanks for all the good help. 

[MarcoSr]

I agree with Eric on a Brachychampsa id.  Here are several 1.5 mm to 2 mm Brachychampsa sp. teeth from the Campanian Kirtland and Fruitland Formations of New Mexico.

 

 

 

Marco Sr. Click to choose files