List of arthropod orders

Arthropods are invertebrate animals having an exoskeleton, a segmented body, and paired jointed appendages. Arthropods form the phylum Arthropoda. They are distinguished by their jointed limbs and cuticle made of chitin, often mineralised with calcium carbonate. The arthropod body plan consists of segments, each with a pair of appendages. Arthropods are bilaterally symmetrical and their body possesses an external skeleton. In order to keep growing, they must go through stages of moulting, a process by which they shed their exoskeleton to reveal a new one. Some species have wings. They are an extremely diverse group, with up to 10 million species.

Wolf spider carrying its young in its egg sac.
Marrella, one of the puzzling arthropods from the Burgess Shale
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.
A shed carapace of a lady crab, part of the hard exoskeleton

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)
Head of a wasp with three ocelli (centre), and compound eyes at the left and right
A pair of Simosyrphus grandicornis hoverflies mating in flight.
Aedes aegypti, a parasite, is the vector of dengue fever and yellow fever

Subclass Monocondylia or monochlamydia

Subclass Dicondylia

Class Entognatha
Proturan specimen (Acerentomon sp.)

Subphylum Chelicerata

Class Xiphosura

Class †Eurypterida

Class Arachnida (Arachnids)
Araneus diadematus spider

Class Pycnogonida
Pycnogonida

Subphylum Myriapoda (Centipedes and millipedes)
A representative millipede and centipede (not necessarily to scale)
Ammodesmus nimba from Guinea, West Africa, curled in a defensive coil

Class Chilopoda (Centipedes)

Class Diplopoda (Millipedes)
See also: List of millipede families

Subclass Penicillata

Subclass Chilognatha

Class Pauropoda
A pauropod

Class Symphyla

Subphylum Crustacea (Crustaceans)
  • Order †Agnostina
  • Order †Henningsmoenicarida
  • Order †Cambropachycopida
  • Order †Cambrocarida
  • Order †Martinssoniida
  • Order †Phosphatocopida
  • Order †Bostrichopodida

Class †Thylacocephala

Class Remipedia

Class Branchiopoda
Branchiopods

Class Cephalocarida

Class Thecostraca

[3]

Subclass Ascothoracida

Subclass Cirripedia (Barnacles)

Subclass Copepoda (Copepods)
Cyclops (Copepoda: Cyclopoida)

Class Branchiura

Class Pentastomida (Tongue worms)
Adult female Linguatula serrata

Class Mystacocarida

[4]

Class Ostracoda (Ostracods, or seed shrimp)
Ostracod
  • Order †Eridostracoda

Subclass †Leperditicopa
  • Order †Leperditicopida
  • Order thippslicus

Subclass †Leiocopa
  • Order †Leiocopida

Subclass Palaeocopa

Subclass Myodocopa

Subclass Podocopa

Class Malacostraca (Malcostracans, such as crabs and lobsters)
Syncarid Atlantic blue crab Callinectes sapidus
Hoplocarid
Nebalia bipes Phyllocarid
See also: List of prehistoric malacostracans

Subclass Eumalacostraca

Subclass Hoplocarida

Subclass Phyllocarida
  • Order ?†Discinocarida
  • Order †Archaeostraca
  • Order †Hoplostraca
  • Order Leptostraca

Subphylum †Artiopoda

no class

Class †Protosutura
  • Order †Acanthomeridiida

Class †Aglaspida

Class †Trilobita
See also: List of trilobite genera
Paradoxides

Subclass †Petalopleura
  • Order †Sinoburiida
  • Order †Xandarellida

Subclass †Nectopleura

Subclass †Conciliterga

Subclass †Trilobita

Other classes

no class

Class †Megacheira
Reconstructed Leanchoilia

Class †Marrellomorpha

Class †Dinocaridida

Class †Euthycarcinoidea

References
  1. 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.
  2. Hoffman, R.L. (1963). "New genera and species of Upper Paleozoic Diplopoda". Journal of Paleontology. 37 (1): 167–174. JSTOR 1301419.
  3. "World Register of Marine Species". Retrieved 2021-08-24.
  4. WoRMS (2021). Mystacocarida. Accessed at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1079 on 2021-08-23
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