Here is a inexpensive example of a Ormathops atavus from Rokycany. In a typical Rokycany nodule. | |||
Location: | Rokycany Osek, Barrandian area, Czech Republic | ||
| Size trilobite: | about 23 mm wide | ||
| Age: | Middle Ordovician, Llandeilo, Šárka Formation (About 464 mill. Years old) | ||