| Here is a very dcetaild cephalon of a Ormathops atavus that shows a fantastic trilobite eyes. | |||
| Location: | Rokycany Osek, Barrandian area, Czech Republic | ||
| Size trilobite: | labout 16 mm wide | ||
| Age: | Middle Ordovician, Llandeilo, Šárka Formation (About 464 mill. Years old) | ||