Order Pseudoscorpionida, commonly known as pseudoscorpions, are small, arachnid-like creatures that are found worldwide. They are not dangerous to humans and are often considered beneficial because they feed on insects, mites, and other small arthropods. There are several synonyms for the order Pseudoscorpionida, including Chelonethida, Chernetida, and Pseudoscorpiones. These synonyms are often used interchangeably to refer to this group of animals. Pseudoscorpions are fascinating creatures that have unique adaptations for survival, including the ability to live in a variety of environments and to mate in unusual ways. Overall, the order Pseudoscorpionida is an important part of the arthropod community and should be appreciated for its many contributions.