Here is an excellent Flexicalymene retrorsa from the Ordovician of Ohio. This enrolled trilobite is extremely inflated, has very nice articulation, and exhibits fine detail. Both free cheeks are present and tightly attached. This bug has wonderful, thick exoskeleton of a brownish color that contrasts very well with the green-grey matrix. This is a large, enrolled specimen of Flexicalymene that displays beautifully.