William G Parker
I am a vertebrate paleontologist and biostratigrapher who primarily works in early Mesozoic rocks of the Colorado Plateau. I have B.S. and M.S. degrees in Geology from Northern Arizona University and a Ph.D. in Geology from the University of Texas at Austin. I have been the lead paleontologist at Petrified Forest National Park in Arizona since 2001.
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This looks a lot like a phytosaur tooth. Can the authors further explain why it is not?