I have been to Graf, Iowa three times in the last 10 years and am always amazed at this site with the shear number of cephalopods exposed in the rock face. This fourth trip was made to find some material for a forum member. In doing so, I took the time to look closely at the matrix present at Graf. There were gastropods, brachiopods, bivalves ,graptolites, and even trilobites hidden in the rock. I had never noticed this on my previous trips since the cephalopods are overwhelming. I would love to go back another time soon and NOT look at the cephalopods at all, to see what I could find. I am here today to get Identification of the trilo-bits that I found at Graf. My guess is Thelecalymene mammillata. @piranha
@DevonianDigger, if you still are looking for trilobits, I can send a few of these.
2018-10-009.cxf