Pseudoscorpionida refer to small, wingless arachnids that resemble scorpions but lack venomous tails. They are found in a variety of habitats all around the world, including soil, leaf litter, and cave systems. Synonyms for pseudoscorpionida include false scorpions, book scorpions, and Chernetidae. False scorpions are called this due to their striking resemblance to actual scorpions, whereas book scorpions refer to their habit of hiding in books to prey on booklice and other small insects. The Chernetidae family includes some of the most commonly encountered genera of pseudoscorpions, such as Chthonius and Neobisium. Regardless of their name, these unique creatures are fascinating to observe and play important roles in their respective ecosystems.