Here is a Trilobite from the Order Agnostida that belongs to the seldom species Ptychagnostus atavus. This detailed preserved fossil was found in the Wheeler Formation of Utah. | |||
Location: | Millard Co., Utah, USA | ||
| Size trilobite: | about 9 mm long | ||
| Age: | Middle Cambriun, Wheeler Fm. (about 518 Mill. Y.) | ||