| Here is a good Placoparia barrandei with a nice colour from a typical Rokycany nodule. | |||
| Location: | Rokycany Osek, Barrandian area, Czech Republic | ||
| Size trilobite: | about 20 mm long | ||
| Age: | Middle Ordovician, Llandeilo, Šárka Formation (About 464 mill. Years old) | ||