Clitellata

class of annelids Clitellata (Clitellata) is a class of organisms united by key anatomical and physiological traits. It contains 7 orders with 60 known species. Key order groups include Arhynchobdellida, Crassiclitellata, Enchytraeida, Haplotaxida, Lumbriculida, and Rhynchobdellida. Among its members, 1 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Segmented Worms (Annelida).