Help please!
Last weekend I was on a club trip here in Eastern Iowa, and I found a really cool fossil. According to other club members, the layer it appeared to come from is roughly 385 million years old, possibly from the Little Cedar Formation, although we can't be sure. We believe that it is likely plating from an armored fish. A photo with a couple measurements is attached. The bumps vary in size, but are about 3 mm in diameter.
I've reached my photo size limit, so I will try to add more close up photos in a little bit.
What species could this be?
What part of the body would it be from?
Thanks!
-Ben Worrell