Ceratodontiformes

order of fishes Ceratodontiformes (Ceratodontiformes) is an order comprising closely related families of organisms. It contains 3 families with 6 known species. This includes the family groups Lepidosirenidae, Neoceratodontidae, and Protopteridae. Among its members, 1 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). It belongs to Dipneusti (Dipneusti).