Here is a trilobite cluster from the Weeks Fm of Utah with Cedaria minor and the brachiopod Lingulella sp.. The largest trilobite measures about 12mm, some specimens are shown from ventral body side. | |||
Location: | Millard Co., Utah, USA | ||
Size matrix: | about 70 x 80 mm | ||
Age: | Upper Cambrian, Weeks Fm., (about. 518 Mill. y.o.) |