| This is an example of a rare "Nevada Trilobit" of the species Zacanthoides typicalis from Chisholm Shale.
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Location: | Pioche , Nevada, USA | ||
| Size: | about 26 mm long | ||
| Age: | Lower Cambrian, Chisholm Shale, upper Glossopleura Zone (ca. Mill. 520 Years.) | ||