List of arthropod orders
Appearance
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/55/Lycosidae_female_carrying_young.jpg/240px-Lycosidae_female_carrying_young.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/74/Marrella.jpg/240px-Marrella.jpg)
![A convex oval-shaped piece of shell, covered with fine orange-pink markings: the front edge is lined with 13 coarse serrations, while the rear edge is smooth.](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Crab_from_Long_Island.jpg/240px-Crab_from_Long_Island.jpg)
Arthropods are invertebrate animals with a chitinous exoskeleton, segmented bodies, and jointed legs. The phylum Arthropoda contains numerous taxonomic orders in over 20 classes.
Subphylum Hexapoda
Class Insecta (Insects)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Hoverflies_mating_midair.jpg/240px-Hoverflies_mating_midair.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/48/Aedes_aegypti_biting_human.jpg/240px-Aedes_aegypti_biting_human.jpg)
- Order Archaeognatha – 350 (Jumping bristletails)
- Order Zygentoma – 370
- Order †Monura
- Order Odonata – 5,900 (Dragonflies and damselflies)
- Order Ephemeroptera – 3,000 (Mayflies)
- Order Hemiptera – 50,000–80,000 (True bugs)
- Order Psocodea – 11,000 (Lice, bark lice, book lice)
- Order Thysanoptera – 5,000 (Thrips)
Superorder Odonataptera
- Order †Geroptera
- Order †Protanisoptera
- Order †Triadophlebioptera
- Order †Protozygoptera
- Order †Meganisoptera
- Family †Lapeyriidae
- Family †Campylopteridae
- Family †Erasipteridae (likely paraphyletic)
Superorder Palaeodictyopteroidea
- Order †Archodonata
- Order †Diaphanopterodea
- Order †Megasecoptera
- Order †Palaeodictyoptera
Superorder Holometabola
- Order Coleoptera – 360,000–400,000 (Beetles)
- Order Diptera – 152,956 (Flies)
- Order Hymenoptera – 115,000 (Sawflies, wasps, bees, and ants)
- Order Lepidoptera – 174,250 (Butterflies and moths)
- Order †Protodiptera (Permotipula and Permila)
- Order Mecoptera – 481 (Scorpionflies)
- Order †Miomoptera
- Order Megaloptera – 250–300 (Alderflies, dobsonflies, and fishflies)
- Order Neuroptera – 5,000 (Net-winged insects)
- Order Raphidioptera – 210 (Snakeflies)
- Order Siphonaptera – 2,525 (Fleas)
- Order Strepsiptera – 596 (Twisted-wing parasites)
- Order Trichoptera – 12,627 (Caddisfly)
(Unranked) Polyneoptera
- Order Dermaptera – 1,816 (Earwigs)
- Order †Protelytroptera
- Order †Caloneurodea
- Order Embioptera – 200–300 (Webspinners)
- Order †Protorthoptera (Paraphyletic assemblage of basal and stem polyneopterans)
- Order †Blattoptera (Paraphyletic assemblage of basal and stem cockroaches)
- Order Mantodea – 2,200 (Mantises)
- Order †Alienoptera
- Order Notoptera – 30 (Includes icebugs)
- Order Orthoptera – 24,380 (Grasshoppers, locusts, crickets, etc.)
- Order Titanoptera
- Order Phasmatodea – 2,500–3,300 (Stick insects or stick-bugs)
- Order Plecoptera – 2,274 (Stoneflies)
- Order Zoraptera – 28 (Angel insects)
- Order Blattodea – 3,684–4,000 (Cockroaches and termites)
Incertae sedis
- Order †Glosselytrodea
- Order †Coxoplectoptera
Class Entognatha
![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Protura_specimen_%28Acerentomon_species%29_micrograph.jpg/199px-Protura_specimen_%28Acerentomon_species%29_micrograph.jpg)
- Order Collembola (Springtails)
- Order Diplura (Diplurans)
- Order Protura (Coneheads)
Subphylum Chelicerata
Clade Prosomapoda
- Order Xiphosura
Clade Sclerophorata
- Order Eurypterida
Class Arachnida (Arachnids)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f1/Araneus_diadematus_%28aka%29.jpg/220px-Araneus_diadematus_%28aka%29.jpg)
Subclass Acari
- Order Opilioacariformes
- Order Ixodida (Ticks)
- Order Holothyrida
- Order Mesostigmata
- Order Trombidiformes
- Order Oribatida (Beetle mites)
- Unranked clade Astigmatina
- Order Amblypygi (Whip spiders)
- Order Araneae ("True" spiders)
- Order †Haptopoda (Plesiosiro madeleyi)
- Order Opiliones (Harvestmen, also known as daddy longlegs)
- Order Palpigradi (Microwhip scorpions)
- Order †Uraraneida
- Order †Phalangiotarbida
- Order Pseudoscorpionida (Pseudoscorpions, or false scorpions)
- Order Ricinulei (Hooded tickspiders)
- Order Schizomida (Shorttailed whipscorpions)
- Order Scorpiones (True scorpions)
- Order Solifugae (Sun spiders or wind scorpions)
- Order Thelyphonida (Whip scorpions)
- Order †Trigonotarbida
Class Pycnogonida (Sea spiders)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/27/Sea_spider.jpg/199px-Sea_spider.jpg)
- Order Pantopoda
Class Yunnanata †
- Order Fuxianhuiida (Fuxianhuia protensa)
Subphylum Myriapoda (Centipedes and millipedes)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Millipede_centipede_side-by-side.png/220px-Millipede_centipede_side-by-side.png)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Ammodesmus_nimba_male.jpg/170px-Ammodesmus_nimba_male.jpg)
Class Chilopoda (Centipedes)
- Order Scutigeromorpha
- Order Lithobiomorpha (stone centipedes)
- Order Craterostigmomorpha
- Order Scolopendromorpha (tropical centipedes)
- Order Geophilomorpha (soil centipedes)
Class Diplopoda (Millipedes)
Subclass Penicillata
- Order Polyxenida (Bristly millipedes)
Subclass †Arthropleuridea
- Order †Arthropleurida
- Order †Eoarthropleurida
- Order †Microdecemplicida (Microdecemplex rolfei)
Subclass Chilognatha
- Order †Zosterogrammida [1]
- Infraclass Pentazonia
- Order †Amynilyspedida
- Superorder Limacomorpha
- Order Glomeridesmida
- Superorder Oniscomorpha (Pill millipedes)
- Order Glomerida
- Order Sphaerotheriida (Giant pill millipedes)
- Superorder †Archipolypoda
- Order †Archidesmida
- Order †Cowiedesmida
- Order †Euphoberiida
- Order †Palaeosomatida
- Order †Pleurojulida
- Order Platydesmida
- Order Polyzoniida
- Order Siphonocryptida
- Order Siphonophorida
- Superorder Juliformia
- Order Julida
- Order Spirobolida
- Order Spirostreptida
- Superfamily Xyloiuloidea † (Sometimes aligned with Spirobolida)[2]
- Superorder Nematophora
- Order Callipodida
- Order Chordeumatida
- Order Stemmiulida
- Order Siphoniulida
- Order Polydesmida (Flat-backed millipedes)
Class Pauropoda
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c8/Eurypauropodid_%2812742282145%29_crop.jpg/170px-Eurypauropodid_%2812742282145%29_crop.jpg)
- Order Pauropodina
Class Symphyla: no order (garden centipedes)
- Family Scutigerellidae
- Family Scolopendrellidae
Class Arthropleuridea †
- Order Arthropleurida
- Order Eoarthropleurida
- Order Microdecemplicida
Subphylum Crustacea (Crustaceans)
Class Thylacocephala? †
- Order Concavicarida
- Order Conchyliocarida
Class Branchiopoda
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/12/Triops-longicaudatus-dorsal-ventral-edit2.jpg/220px-Triops-longicaudatus-dorsal-ventral-edit2.jpg)
- Order Anostraca (Fairy shrimp)
- Order Notostraca (Tadpole shrimp)
- Subclass Diplostraca (Clam shrimp)
- Order Cyclestherida
- Order Cladocera (Water fleas)
- Order Laevicaudata
- Order Spinicaudata
Class Remipedia
- Order Enantiopoda †
- Order Nectiopoda
Class Cephalocarida (Horseshoe shrimp)
- Order Brachypoda
Class Maxillopoda
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/44/Cyclops.jpg/190px-Cyclops.jpg)
Subclass Thecostraca
- (unranked) Facetotecta
- Infraclass Ascothoracida
- Order Laurida
- Order Dendrogastrida
- Infraclass Cirripedia (Barnacles)
- Order Pygophora
- Order Apygophora
- Order Kentrogonida
- Order Akentrogonida
- Order Pedunculata (Goose barnacles)
- Order Sessilia (Acorn barnacles)
Subclass Tantulocarida
- Family Deoterthridae (no order)
Subclass Branchiura
Subclass Pentastomida (Tongue worms)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/cd/Linguatula.jpg/170px-Linguatula.jpg)
- Order Cephalobaenida
- Order Porocephalida
- Order Raillietiellida
- Order Reighardiida
Subclass Mystacocarida
- Order Mystacocaridida
Subclass Copepoda (Copepods)
- Order Calanoida
- Order Cyclopoida
- Order Gelyelloida
- Order Harpacticoida
- Order Misophrioida
- Order Monstrilloida
- Order Mormonilloida
- Order Platycopioida
- Order Poecilostomatoida
- Order Siphonostomatoida
Class Ostracoda (Ostracods, or seed shrimp)
Subclass Myodocopa
- Order Myodocopida
- Order Halocyprida
Subclass Podocopa
- Order Platycopida
- Order Podocopida
Class Malacostraca (Malcostracans, such as crabs and lobsters)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/99/The_Childrens_Museum_of_Indianapolis_-_Atlantic_blue_crab.jpg/220px-The_Childrens_Museum_of_Indianapolis_-_Atlantic_blue_crab.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/6e/Odontodactylus_scyllarus3.jpg/220px-Odontodactylus_scyllarus3.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/57/Nebalia_bipes.jpg/220px-Nebalia_bipes.jpg)
Subclass Eumalacostraca
- Superorder Syncarida
- Order Anaspidacea Calman, 1904
- Order Bathynellacea Chappuis, 1915
- Order Palaeocaridacea
- Superorder Peracarida
- Order Amphipoda (Includes freshwater shrimp and sandhoppers)
- Order Cumacea (Hooded shrimp)
- Order Isopoda (Isopods - includes wood lice)
- Order Lophogastrida
- Order Mictacea
- Order †Pygocephalomorpha
- Order Spelaeogriphacea
- Order Stygiomysida
- Order Tanaidacea (Tanaids)
- Order Thermosbaenacea
- Superorder Eucarida
- Order Amphionidacea (Amphionides reynaudii)
- Order Decapoda (Crayfish, crabs, lobsters, prawns, and shrimp)
- Order Euphausiacea (Krill)
Subclass Hoplocarida
- Order Stomatopoda (Mantis shrimp)
- Order Aeschronectida †
- Order Palaeostomatopoda †
Subclass Phyllocarida
- Order Leptostraca
- Order Hymenostraca † (Hymenocaris vermicauda)
- Order Archaeostraca †
Subphylum Trilobitomorpha †
Class Trilobita † (Trilobites)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Paradoxides_sp.jpg/220px-Paradoxides_sp.jpg)
- Order Agnostida †
- Order Asaphida †
- Order Corynexochida †
- Order Harpetida †
- Order Nectaspida †
- Order Redlichiida †
- Order Lichida †
- Order Phacopida †
- Order Proetida †
- Order Ptychopariida †
Other classes
Class Megacheira †
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Leanchoilia.jpg/199px-Leanchoilia.jpg)
- Order Leanchoilia †
- Order Pectocaridida †
Class Merostomoidea †
- Order Limulavida †
- Order Emeraldellida †
Class Marrellomorph †
- Order Marrellida †
Class Cheloniellida (no orders)†
- Genus Cheloniellon
- Genus Duslia
- Genus Neostrabops
- Genus Paraduslia
- Genus Pseudarthron
- Genus Triopus
Class Dinocaridida †
- Order Radiodonta †
- Order Anomalocarididae †
- Order Opabiniidae †
Subclass Euthycarcinoidea †
- Order Euthycarcinida
Order Phosphatocopida †
- (unranked) Hesslandonina
- (unranked) Vestrogothiina
References
- ^ Shear, William A.; Edgecombe, Gregory D. (2010). "The geological record and phylogeny of the Myriapoda". Arthropod Structure & Development. 39 (2–3): 174–190. doi:10.1016/j.asd.2009.11.002. PMID 19944188.
- ^ Hoffman, R.L. (1963). "New genera and species of Upper Paleozoic Diplopoda". Journal of Paleontology. 37 (1): 167–174. JSTOR 1301419.