Praearcturus gigas Confirmed as 1-Meter Scorpion From 415 Million Years Ago
Updated
Updated · The Natural History Museum · Jun 3
Praearcturus gigas Confirmed as 1-Meter Scorpion From 415 Million Years Ago
3 articles · Updated · The Natural History Museum · Jun 3
Summary
Fossil fragments from England and Wales have now been identified as Praearcturus gigas, confirming a scorpion more than 1 meter long as the largest ever found.
New analysis tied the animal to scorpions by matching a distinctive triangular sternum to Eramoscorpius, a clearly preserved ancient scorpion described from Canada in 2015.
Its 16-centimeter pincers and Early Devonian age suggest it was among the first large land predators, hunting small arthropods and likely also feeding in water on fish and other prey.
The finding pushes giant arthropods far earlier than famous Carboniferous forms, implying scorpions reached huge size when land ecosystems were still sparse and large predators were absent.
Researchers say more fossils are needed to test whether Praearcturus survived another 40 million years and to clarify how early scorpions moved between land and water.
How did the first giant land predator grow to over a metre long without the high oxygen that fueled later behemoths?
This giant scorpion may have returned to the water. Does this rewrite the story of how animals conquered the land?
Reclassifying Praearcturus gigas: The Discovery of the World’s Largest Scorpion from 415 Million Years Ago
Overview
For over a century, fossils of Praearcturus gigas were preserved in the Natural History Museum and thought to be from a giant crustacean. Their true identity remained a mystery because of unique features and the limits of old scientific methods. Recently, researchers used modern techniques and comparative analysis to re-examine these historic specimens. This breakthrough revealed that Praearcturus gigas is actually the largest scorpion ever known. The discovery not only solves a long-standing puzzle but also gives new insight into the early evolution of giant scorpions and highlights the value of museum collections for future scientific discoveries.