English: An Olenellus fowleri trilobite, Order Redlichiida, Family Olenellidae, 15mm along the axis, collected from the Pioche Shale, Lincoln County, Nevada, USA, from the late Lower Cambrian (Toyonian); well-developed opisthothorax, that is characteristic for the species is missing, but well recognisable by the pleural spines that, except for the macropleural spine on segment 3, become longer further tailward and are relatively long, giving the species a spidery look
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