Trilobite fossil in Utah shale

These are Elrathia Kingi trilobites from the House Range in Millard County, Utah.

They are mostly complete specimens in the Utah shale from which they were harvested.

The specimen you would receive will be exactly the one you select from the drop down menu.

Trilobites are a well-known fossil group, probably the second best known fossil group in the world (behind dinosaurs).
These are from the mid- Cambrian period about 550 million years ago.

As a species, trilobites disappeared from earth in a mass extinction event at the end of the Permian period about 250 million years ago.