Chelifer simoni, commonly known as the Simon's pseudoscorpion, is a small arachnid belonging to the order Pseudoscorpiones. It is typically found in leaf litter and soil habitats across Europe. This species has a flattened body, with a pair of large pincers resembling scorpion claws, which it uses to capture and immobilize its prey. Chelifer simoni plays a beneficial role in ecosystems as it preys on small insects and mites, helping to control their populations.