| Here is a good specimen of this hard to find Agnostid Trilobite from the Spence Shale of the State Idaho. | |||
Location: | Spence Gulch, near Liberty, Idaho USA | ||
| Size trilobite: | about 5 mm long | ||
| Age: | Middle Cambrian, Spence Shale., Langston Fm. (about. 518 Mill. y.o.) | ||