| Here we have a very rare Oryctocephalites tegehter with a netive and a Potivive of a Peronopsis brighamensis that is also a quite uncommon Agnostid trilobite. | |||
Location: | Spence Gulch, near Liberty, Idaho USA | ||
| Size trilobite: | about 10 & 5 mm long | ||
| Age: | Middle Cambrian, Spence Shale., Langston Fm. (about. 518 Mill. y.o.) | ||