| This is a Cheirocrinid rhombiferan cystoid plate, closely related to the echinoderm called Cheirocrinus, from the Middle Ordovcian Antelope Valley Limestone, Beatty mudmound, Nye County, Nevada. The specimen is seven millimeters long. |
| This is a Cheirocrinid rhombiferan cystoid plate, closely related to the echinoderm called Cheirocrinus, from the Middle Ordovcian Antelope Valley Limestone, Beatty mudmound, Nye County, Nevada. The specimen is seven millimeters long. |