Early Cambrian
Pioche Formation: c-Shale
Pioche, Lincoln County, NV, USA

Good 0.5 inch positive on 3 x 2 inch slab. Missing pygidium.

Nephrolenellus is a genus that belongs to perhaps the most ancient trilobite group (Order Redlichiidia).  It lived only during Early Cambrian.

In the old days a lot of people used to go to Pioche because they could collect trilobites from a few different localities representing different ages.  Digging is more restricted these days.

Here’s a good, affordable specimen for a beginner collector.