Gigantoscorpio

Gigantoscorpio willsi is an extinct species of scorpion which lived between 345.0million and 342.8million years ago, during the Visean age of the Carboniferous. Its type specimen is BMNH In. 42706a,b, In. 42707, which is a 3D body fossil of its exoskeleton found near modern-day United Kingdom. It is thought to have grown up to around 40 cm long, but later study estimated its total length about 24 cm.