I've explored many outcrop of Ordovician rock in the Cincinnati region of Ohio/Kentucky/Indiana but never have I found a whole trilobite. The local collectors are so efficient that even parts can be hard to find. My friend Herb had the unfortunate experience of listening to me grumble about this fact so he gave me this enrolled specimen of Flexicalymene. He found it near Waynesville, OH in the Whitewater Formation which is Ordovician in age (Richmondian stage of the Cincinnatian series which corresponds to the Ashgill stage in Europe and Katian stage of the ICS).
Thanks to Herb for giving me this fossil. One day I hope to find one for myself "in the wild".