6jtpsl ((TRILOBITE, Elrathia Kingi)) Wheeler Amphlitheater, Wheeler formation, Millard County, Utah 530 million years old, 11.5 x 8. x 1.5 cm | |
Cambrian trilobite Elrathia Kingi from Utah. The shale has two trilobites, one without cheeks and one with cheeks. The cheekless ones are actually molts and are much more common. The trilobites with cheeks were the actual live trilobites that died. |