| This is a inexpensive trilobite of the species Ogyginus corndensis with positive and negative side from Gilwern Hill in Wales. | |||
Location: | Gilwern Hill, Builth Wells, Powys, Wales | ||
| Size: | about 23 mm long | ||
| Age: | Ordovizian, Llanvirn (Darriwilian) (About . 470 Mill. Years) | ||