Pseudoscorpiones

order of arachnids Pseudoscorpiones (Pseudoscorpiones) is an order comprising closely related families of organisms. It contains 7 families with 21 known species. Key family groups include Cheiridiidae, Cheliferidae, Chernetidae, Chthoniidae, Larcidae, and Neobisiidae. Among its members, 4 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Arachnids (Arachnida).