Here is a fantastic faunal piece with the trilobites Deanaspis goldfussi and Dalmanitina socialis in a very detailed and 3dimensional preservation. The Deanaspis cephalon does have the genal spines still attached and the Dalmanitina pygidium has the tail spine free standing.
Location:
Beroun, Barrandian area, Czech Republic
Size Matrix:
about 48 x 40 mm
Age:
Middle Ordovician, Llandeilo, Letná Formation (About 464 mill. Years old)