Brontoscorpio anglicus

Brontoscorpio anglicus was a fossil scorpion that lived during the Silurian Period, approximately 430 million years ago. Unlike most modern scorpions, Brontoscorpio was a giant, with fossils suggesting lengths ranging from 35 cm (14 inches) to over a meter (3.3 feet).12

Early scorpions, including Brontoscorpio, were likely marine or amphibious, possessing gills and legs adapted for a benthic existence. The evolution of enclosed book lungs was a key adaptation that allowed scorpions to transition to terrestrial life during the Carboniferous Period. The basic body plan of scorpions, with a segmented body, pedipalps, eight walking legs, and a stinger, has remained remarkably consistent for over 430 million years.1