Gymnophiona

order of amphibians Caecilian (Gymnophiona) is an order comprising closely related families of organisms. It contains 7 families with 33 known species. Key family groups include Caeciliidae, Dermophiidae, Herpelidae, Ichthyophiidae, Rhinatrematidae, and Siphonopidae. Among its members, 2 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Amphibians (Amphibia).