Lower Ordovician, Llanvirn series, Llandelian stage, Hastsgraptus Tereticulus biozone
Pencerig Builth Wells, Powys, Wales
The preservation is very good and this is essentially complete minus the spines. A fine U.K specimen. Complete Trilobites from this location are not easy to find and this is a very nice example.
The specimen measures approximately 2.9cm in length