Brontoscorpio anglicus

*Brontoscorpio anglicus* lived during the Silurian period, approximately 420 million years ago. It is known exclusively from fossil evidence discovered in the United Kingdom, specifically within the Old Red Sandstone deposits of England. This places it among some of the earliest known terrestrial or semi-aquatic arachnids in the fossil record.

*Brontoscorpio anglicus* was a giant scorpion, with estimates suggesting it reached lengths of up to 90 centimeters (about 3 feet). This makes it significantly larger than almost all modern scorpion species, which typically average just a few inches in length. Its massive size was likely supported by the highly oxygenated coastal or aquatic environments of the Silurian period.

Paleontologists believe *Brontoscorpio anglicus* was likely semi-aquatic or transitional, moving between marine and marginal terrestrial environments. The fossils show gills, indicating it still relied heavily on water for respiration, similar to modern horseshoe crabs. However, its robust limbs suggest it could have ventured onto land for short periods to hunt or molt.

The fossilized remains of *Brontoscorpio anglicus* were discovered in Shropshire, England, within the early Devonian/Silurian-aged Lagerstätte rock formations. The primary evidence consists of a massive, isolated pedipalp claw (pincer) found in these ancient terrestrial deposits. The name *anglicus* directly references its English origins.