@llundgren, @matthew-croxton, @egardner, @jeanette-pirlo I knew I should have slept on this before giving all of that information about the specific names last night. I made an error!! The two species names I listed for John’s Primaspis are actually species names for Cryptolithus. Primaspis should be Primaspis crosotus.
For more information and ID help with Cincinnatian trilobites go to the Dry Dredgers website trilobite pages: http://www.drydredgers.org/trilobit.htm
Jack