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Hi, @rob-mccannell – did you want me to tag in some shark experts to verify your identification?

You location and geologic context don’t seem to add up to me, can you verify that’s where you collected the fossil? Talk to you soon, Jen

The youngest species of Xenacanthus is Triassic 200+ million years old, some are as old as Devonian 380 million years old. The oldest material in Aurora is Miocene, 20 million years old. So no way. I can’t tell from the picture angle as to what it is.