| Here is a rare Ogygopsis typicalis from Idaho. The Trilobite genus Ogygopsis is actually typical for the famous Burgess Shale. | |||
Location: | Spence Gulch, near Liberty, Idaho USA | ||
| Size trilobite: | about 28 mm long | ||
| Age: | Middle Cambrian, Spence Shale., Langston Fm. (about. 518 Mill. y.o.) | ||