Family Ctenizidae is a group of spiders commonly known as trapdoor spiders. They are characterized by their ability to construct burrows with a specially designed trapdoor, from which they ambush their prey. There are several synonyms used for this family, including Atypidae and Mygalomorphae. Atypidae is another family of spiders, known as purseweb spiders, that share some similarities with Ctenizidae. Mygalomorphae is a suborder of spiders that also includes tarantulas and funnel-web spiders. While these synonyms may be used interchangeably, it is important to note that they represent distinct groups of spiders with different morphological and behavioral characteristics. Regardless of the name, trapdoor spiders are fascinating creatures that play an important role in their ecosystem.