Trilobita Order Agnostida, Family Ptychagnostidae
Geologic Time: Middle Cambrian
Size: Trilobites 3.5 mm - 7mm
Fossil Site: Marjum Formation, Millard County, Utah
This is a mortality plate containing very nice complete and partial specimens of an uncommon species of blind trilobites known as Ptychagnostus richmondensis .
click fossil pictures to enlarge
