A pseudoscorpion, (also known as a false scorpion or book scorpion), is an arachnid belonging to the order Pseudoscorpionida, also known as Pseudoscorpiones or Chelonethida.

Physical characteristics

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Pseudoscorpions are small, scorpion-like arthropods with a flat, pear-shaped body with two sections, eight 5-segmented legs, and simple eyes. The color of the body can be yellowish-tan to dark-brown, with the paired claws often a contrasting color. They have two very long pedipalps, or pincers, which strongly resemble the scorpion's claws, but the pseudoscorpion's abdomen is short and rounded at the rear, rather than extending into a segmented tail and stinger.

They range from 2 to 8 mm (1/12 to 1/3 inch) in length.

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