(Harpacticoida) (Harpacticoida) is a biological order of the phylum Arthropoda (Arthropods) and class Maxillopoda.
Adenopleurellidae
Aegisthidae
Ambunguipedidae
Ameiridae
Ancorabolidae
Argestidae
Balaenophilidae
Cancrincolidae
Canthocamptidae
Canuellidae
Cerviniidae
Chappuisiidae
Cletodidae
Cletopsyllidae
Clytemnestridae
Cristacoxidae
Cylindropsyllidae
Darcythompsoniidae
Diosaccidae
Ectinosomatidae
Euterpinidae
Hamondiidae
Harpacticidae
Huntemanniidae
Laophontidae
Laophontopsidae
Latiremidae
Leptastacidae
Leptopontiidae
Longipediidae
Louriniidae
Metidae
Miraciidae
Neobradyidae
Normanellidae
Novocriniidae
Orthopsyllidae
Paramesochridae
Parastenheliidae
Parastenocarididae
Peltidiidae
Phyllognathopodidae
Porcellidiidae
Pseudotachidiidae
Rhizothricidae
Rotundiclipeidae
Styracothoracidae
Superornatiremidae
Tachidiidae
Tegastidae
Tetragonicipitidae
Thalestridae
Thompsonulidae
Tisbidae
Akentrogonida
Apygophora
Arguloida
Calanoida
Cephalobaenida
Cyclopoida
Dendrogastrida
Gelyelloida
Harpacticoida
Kentrogonida
Laurida
Misophrioida
Monstrilloida
Mormonilloida
Mystacocaridida
Platycopioida
Poecilostomatoida
Porocephalida
Pygophora
Sessilia
Siphonostomatoida
Pedunculata