Rodentia

order of mammals Rodents (Rodentia) is an order comprising closely related families of organisms. It contains 28 families with 862 known species. Key family groups include Anomaluridae, Aplodontiidae, Bathyergidae, Calomyscidae, Capromyidae, and Beavers. Among its members, 85 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Mammals (Mammalia).