As the name hints to us, the Pulmonoscorpius was a species of scorpions that prevailed in the Viséan epoch.
This creature could grow up to 30-feet in length and was tougher than any scorpion you may have seen in your life.
Like any other scorpion, these horrific creatures were venomous and stealthy. They were mostly found in Scotland about 345 million years ago. However, they disappeared after that!