Zacanthoides typicalis
Trilobite
Middle Cambrian
Pioche Formation
Pioche, Lincoln County, Nevada, USA

Fair 0.5 inch partial.

Trilobite.  Arthropod.

Zacanthoides is a trilobite genus known from the Mid-Late Cambrian of various parts of North America from British Columbia to Newfoundland, Mexico to Alaska, plus California, Utah, and Vermont.  It is an uncommon find in Pioche.