Crassiclitellata

order of annelids Crassiclitellata (Crassiclitellata) is an order comprising closely related families of organisms. It contains 5 families with 36 known species. This includes the family groups Acanthodrilidae, Eudrilidae, Lumbricidae, Megascolecidae, and Octochaetidae. Among its members, 1 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Clitellata (Clitellata).