| Here is a large study piece of a Colpocoryphe bohemica in a typical Rokycany concretion. | |||
Location: | Rokycany , Barrandian area, Czech Republic | ||
| Size trilobite: | about 37 mm wide | ||
| Age: | Middle Ordovician, Llandeilo, Šárka Formation (About 464 mill. Years old) | ||