| Trilobite of the genus-species Elrathia kingii from the Middle Cambrian Wheeler Shale, Wheeler Amphitheater, Millard County, Utah. The specimen is roughly 505 million years old. |
| Trilobite of the genus-species Elrathia kingii from the Middle Cambrian Wheeler Shale, Wheeler Amphitheater, Millard County, Utah. The specimen is roughly 505 million years old. |