Megachelicerax cousteaui News

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• Discovery of 500 Million Year Old Megachelicerax Fossil Pushes Spider Origins Back 20 Million Years

  Published: Apr 4, 2026

  Section: Research

  Harvard researchers have identified Megachelicerax cousteaui, a marine predator from Utah, as the oldest known relative of spiders and scorpions. The 500-million-year-old specimen...

• Ancient Predator Discovered in Utah Rewrites Evolutionary Timeline for Spiders and Horseshoe Crabs

  Published: Apr 1, 2026

  Section: Science & Tech

  Harvard researchers have identified Megachelicerax cousteaui, a 500-million-year-old fossil that represents the oldest known chelicerate. The discovery of this Cambrian-era pincer-...