Rare Mosasaur

I headed out after a recent rain a few weeks back and hit one of my spots.  The normal small Ptychodus teeth were there, But today there was more.  I got a nice bladed tooth, and  a pretty rare Mosasaur tooth. Plioplatecarpine Mosasaur according to the Dallas Museum.  One of the earliest Mosasaur.  I found this same species, almost same tooth about 2 years ago not far from where I found this one.  Lucky?

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