Beach fossil, Manasota Key, Florida

[SarahL]

I found this at low tide on Manasota Key, Florida. We've collected shark teeth and other small fossils here for years, but this is a mystery for us! When we first picked it up at the high water line, it was black, but dried to a lighter gray over the course of a week. I asked locals and got guesses from a tortoise shell (it seems too thick?) to a megladon tooth (the v in the center is pointing the wrong direction, I think). The pictures are FRONT - Height & Width (with ruler), BACK view (no ruler), right edge showing holes and front , left side (with ruler) showing thickness. The gray color is accurate, the brown color is not- I used a flash on those photos to show the ruler.

[PODIGGER]

Nice piece of tortoise/turtle shell I believe.  Definitely not a tooth.

[SarahL]

Thank you!!