| This is a example with two trilobite heads of the species Bristolia bristolensis and Mesonacis fremonti from the Latham Shale of California.
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Location: | San Bernardino County, California, USA | ||
| Size Matrix: | about 100 x 130 mm | ||
| Age: | Lower Cambrian, Latham Shale Fm. (about. 520 years) | ||