Siphonaptera

order of insects Siphonaptera (Siphonaptera) is an order comprising closely related families of organisms. It contains 7 families with 48 known species. Key family groups include Ceratophyllidae, Ctenophthalmidae, Hystrichopsyllidae, Ischnopsyllidae, Leptopsyllidae, and Pulicidae. It belongs to Insects (Insecta).