I apologize that I didn't take a better picture. I realize that you don't have much to work with but I'm wondering if anyone can help me ID the largest fossil that's visible in this rock. I didn't put anything in for scale. The rock is sitting on a paper towel (not the best reference for size). I believe it is surrounded by straight cephalopods. I was with my cousin when she found this fossil on her private property in Epworth, Iowa. I'd like to know more about this fossil. I am a science teacher and I'd like to share this picture with my class and I'd like to know more about it to answer any questions that may arise. The actual fossil is still in Iowa at my cousin's house. I may be able to have her take additional pics.