Here is a detailed Nevada trilobite of the species Olenellus gilberti from the Pioche Shale of the Ruin Wash. Including the pygidial spine, this trilobite is about 17 mm long.
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Location: | Ruin Wash, Lincoln Co., Nevada, USA | ||
Size matrix: | about 63 x 44 mm | ||
Age: | Spätes Unter- Kambrium, Pioche Formation (ca. 520 Y.o.) |