일반명: 삼엽충(Trilobite)
학명:Olenellus gilberti
크기:(가로+세로+두께) (20mm+24mm+2mm)
시대:전기 캄브리아기( Lower cambrian)
지층: Pioche shale
원산지:Panaca, Nevada, USA
Olenellus is genus of trilobites (extinct arthropods) common in but restricted to Early Cambrian rocks (540 to 520 million years ago) and thus a useful guide fossil for the Early Cambrian. Olenellus had a well-developed head, large and crescentic eyes, and a poorly developed, small tail.