Peripatidae is a family of arthropods that includes creatures known as velvet worms. These invertebrates have long been an object of fascination due to their strange appearance and unique behaviors. While "Peripatidae" is the specific scientific name for this family, there are several synonyms that are commonly used to refer to these creatures. Examples of such synonyms include Onychophora, Udeonychophora, Paraperipatus, Peripatus, and Australoperipatus among others. These alternative names may be easier to remember or provide additional information about the creature being discussed. In any case, whether referred to as Peripatidae or by one of its synonyms, these peculiar arthropods remain highly intriguing.