A taxonomically diverse group of organisms that infest the superficial skin of human beings (and other animals).
Refers to pathogens such as ticks, fleas, lice, parasitic flies and mites that attach or burrow into the skin and remain there for a relatively long period of time (2) (not classically blood-sucking arthropods, such as mosquitoes)
Ectoparasites
Bed bugs
Pseudoparasites
Lice
Nematocysts
Scabies 
Tapeworm
Ticks