| Here is a good Placoparia barrandei double that shows a nice colour in a typical Rokycany nodule. | |||
Location: | Rokycany, Barrandian area, Czech Republic | ||
| Size trilobite: | about 14 & 15 mm long | ||
| Age: | Middle Ordovician, Llandeilo, Šárka Formation (About 464 mill. Years old) | ||