Hi, @tyler-busch – Do you remember the locality you were collecting in? You can use Macrostrat to zoom in on your location and get a better idea for the geologic context : https://macrostrat.org/map/#/z=10.6/x=-82.3217/y=29.7107/bedrock/lines/

I’ll tag in @fauve-wilson and @vperez our local experts to check on your identification.
Talk to you soon,
Jen

It tends to be fairly difficult to identify stingray tail spines past the order Myliobatiformes. I have seen one paper that describes differences between different species. But that may not be possible since the tip of your specimen is broken. The paper I read is called “Tail spine characters of stingrays (order Myliobatiformes) frequenting the…[Read more]