Trilobite Cephalon

Lower Cambrian Poleta Formation

Esmeralda County, Nevada

Part and counterpart (when a piece of shale splits in two, sometimes you get the mirror images of the same specimen on both slabs of shale) of the same trilobite head shield (cephalon) from the Lower Cambrian Poleta Formation, Esmeralda County, Nevada. Nevadia parvoconica.

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