Harpidella misera (Hawle & Corda).
Small piece of brown shale. On one surface are two small Proetids that have undergone ecdysis (moulting). This would have happened seasonally to enable the Trilobites to grow. One has lost the librigenes and the other has not only lost the librigenes but the cranidium has drifted away from the thorax and pygidium. These 'moults' are the remains of the old parts of the Trilobites exoskeletons that have been discarded Nice example.
Silurian, Ludlovian, Kopanina Formation.
Kosov Quarry, near Beroun, Czech Republic.
Matrix : 4.7 x 3.2 x 0.3 cm.
