Reptile
Late Triassic
Bull Canyon Formation
Guadalupe County, New Mexico, USA

Excellent 0.2 inch tooth.

Many extinct reptiles are known only from isolated teeth or jaw sections or bones – often not enough for a formal name.  Add to that, the teeth are also often very similar in form.  Is it the tooth of a small already-established genus?  Could it be from a juvenile?  Is it new to science?  The Bull Canyon Formation vertebrates have gotten some attention in recent years but a lot of study remains to be done.