So I bought an inexpensive 2 inch Angustidens tooth from the auction site that shall not be named. The seller generously sent a couple of free teeth as well. One of them has me quite perplexed. It is a fairly large tooth, around 1.6 inches. It has some nice serrations on it and a pretty distinct looking root. The only thing I could think of is that it looks a little large Thresher shark teeth. I would certainly be surprised if the seller had included a Giant Thresher shark tooth with my purchase so I doubt that is what it is. I really could not find anything else that fit but I am sure somebody here will be to enlighten me. I have no information about where it was collected but I can email the seller. Any help would be appreciated