Olenellus chiefensis

Order Redlichiida / Suborder Olenellina / Superfamily Olenelloidea / Family Olenellidae

Olenus, a trilobite genus name; -ellus, diminutive suffix.

Chief Range, the mountain range where the section is located, Lincoln County, Nevada, USA.

Olenellus (Paedeumias) chiefensis

Cranidium semi-parabolic with distinct intergenal angles; glabella narrow, anterior end of frontal lobe sharply pointed, connected to the posterior extension of the border via a median ridge; three pairs of glabellar furrows; palpebral lobe large, posterior end close to the glabella, opposite the middle of the occipital ring; ocular region narrow. Prothorax of 14 segments, some axial rings possibly with weak axial nodes; 3rd segment macropleural, pleural spine large and long; pleural furrow broad, extending to pleural spine. 15th segment with a long axial spine, about as long as the prothorax. The rest of the thorax and pygidium are unknown.