# Multicrustacea

The clade Multicrustacea constitutes the largest superclass of crustaceans, containing approximately four-fifths of all described non-hexapod crustacean species, including crabs, lobsters, crayfish, shrimp, krill, prawns, woodlice, barnacles, copepods, amphipods, mantis shrimp and others. The largest branch of multicrustacea is the class Malacostraca (see below).

## Classification

Superclass Multicrustacea Regier, Shultz, Zwick, Hussey, Ball, Wetzer, Martin & Cunningham, 2010
* †Family Priscansermarinidae Newman, 2004
* Class Copepoda Milne-Edwards, 1840 – Copepods
** Infra-class Neocopepoda Huys & Boxshall, 1991
*** Super-order Gymnoplea Giesbrecht, 1882
**** Order Calanoida Sars GO, 1903
*** Super-order Podoplea Giesbrecht, 1882
**** Order Cyclopoida Burmeister, 1834
**** Order Gelyelloida Huys, 1988
**** Order Harpacticoida G. O. Sars, 1903
**** Order Misophrioida Gurney, 1933
**** Order Monstrilloida Sars, 1901
**** Order Mormonilloida Boxshall,1979
**** Order Polyarthra Lang, 1944 (=Canuelloida Khodami, Vaun MacArthur, Blanco-Bercial & Martinez Arbizu, 2017 )
**** Order Siphonostomatoida Thorell, 1859
** Infra-class Progymnoplea Lang, 1948
*** Order Platycopioida Fosshagen, 1985
* Class Thecostraca Gruvel, 1905
** Subclass Ascothoracida Lacaze-Duthiers, 1880
*** Order Dendrogastrida Grygier, 1987
*** Order Laurida Grygier, 1987
** Subclass Cirripedia Burmeister, 1834
*** Infraclass Acrothoracica Gruvel, 1905
**** Order Cryptophialida Kolbasov, Newman & Hoeg, 2009
**** Order Lithoglyptida Kolbasov, Newman & Hoeg, 2009
*** Infraclass Rhizocephala Müller, 1862
*** Infraclass Thoracica Darwin, 1854
**** Superorder Phosphatothoracica Gale, 2019
***** Order Iblomorpha Buckeridge & Newman, 2006
***** †Order Eolepadomorpha Chan et al., 2021
**** Superorder Thoracicalcarea Gale, 2015
***** Order Balanomorpha Pilsbry, 1916
***** Order Calanticomorpha Chan et al., 2021
***** Order Pollicipedomorpha Chan et al., 2021
***** Order Scalpellomorpha Buckeridge & Newman, 2006
***** Order Verrucomorpha Pilsbry, 1916
***** †Order Archaeolepadomorpha Chan et al., 2021
***** †Order Brachylepadomorpha Withers, 1923
** Subclass Facetotecta Grygier, 1985
* Class Tantulocarida Boxshall & Lincoln, 1983
** Family Basipodellidae Boxshall & Lincoln, 1983
** Family Cumoniscidae Nierstrasz & Brender à Brandis, 1923 (=Deoterthridae Boxshall & Lincoln, 1987)
** Family Doryphallophoridae Huys, 1991
** Family Microdajidae Boxshall & Lincoln, 1987
** Family Onceroxenidae Huys, 1991
* Class Malacostraca Latreille, 1802
** Subclass Eumalacostraca Grobben, 1892
*** Superorder Eucarida Calman, 1904
**** Order Decapoda Latreille, 1802 – crabs, lobsters, crayfish, shrimp and prawns (includes former order Order Amphionidacea Williamson, 1973)
**** Order Euphausiacea Dana, 1852 – krill
*** Superorder Peracarida Calman, 1904
**** Order Amphipoda Latreille, 1816 – amphipodes, gammares
**** Order Bochusacea Gutu & Iliffe, 1998
**** Order Cumacea Krøyer, 1846 – cumaceae
**** Order Ingolfiellida Hansen, 1903
**** Order Isopoda Latreille, 1817 – isopods (including clover)
**** Order Lophogastrida Sars, 1870 – lophogastrides
**** Order Mictacea Bowman, Garner, Hessler, Iliffe & Sanders, 1985 – mictacés
**** Order Mysida Haworth, 1825 – mysidacés
**** †Order Pygocephalomorpha
**** Order Spelaeogriphacea Gordon, 1957 – spelaeogriphaceae
**** Order Stygiomysida Tchindonova, 1981 – stygiomysides
**** Order Tanaidacea Dana, 1849 – tanaidaceae
**** Order Thermosbaenacea Monod, 1927 – thermosbaenaceae
*** Superorder Syncarida Packard, 1879
**** Order Anaspidacea Calman, 1904
**** Order Bathynellacea Chappuis, 1915
**** †Order Palaeocaridacea Brooks, 1962
** Subclass Hoplocarida Calman, 1904
*** Order Stomatopoda Latreille, 1817 – shrimps-mantes
** Subclass Phyllocarida Packard, 1879
*** †Order Archaeostraca Claus, 1888
*** †Order Canadaspidida Novozhilov, 1960
*** †Order Hoplostraca Schram, 1973
*** †Order Hymenostraca Rolfe, 1969
*** Order Leptostraca Claus, 1880
*** †Genus Nothozoe Barrande, 1872
* Incertae sedis
** Order Cyclida
Notes:
* 1 2 Class Hexanauplia Oakley, Wolfe, Lindgren & Zaharof, 2013 was proposed for copepods and thecopods, but not supported by subsequent studies.

## Fossil record

The earliest fossils representative of Multicrustacea are from the Cambrian. However, the more specific timeline is uncertain. Some Cambrian fossils of uncertain taxonomic placement, such as those of Priscansermarinus, are nonetheless likely to be members of Multicrustacea.

## Image gallery

* Copepod
* Sacculina Sacculina carcini (Rhizocephala) parasite of a crab.
* Anew Lepas anatifera (Lepadiformes)
* Balth Chthamalus stellatus (Sessilia)
* Inch-foot Pollicipes polymerus (Scalpelliformes)
* Amphionides reynaudii , the unique Amphionidacea known.
* Crab Cancer bellianus (Eucarida)
* Antarctic Krill Euphausia superba (Euphausiacea)
* Atylus swammerdami (Amphipoda)
* Diastylis bradyi (Cumacea)
* Bathynomus doederleinii (Isopoda)
* Gnathophausia zoea (Lophogastrida)
* Mictocaris halope (Mictacea)
* Gastrosaccus spinifer (Mysida)
* Tanaissus lilljeborgi (Tanaidacea)
* Tethysbaena ophelicola (Thermosbaenacea)
* Koonunga cursor (Anaspidacea)
* Odontodactylus scyllarus (Stomatopoda)
* Nebalia bipes (Leptostraca)

## Taxonomic references

* World Register of Marine Species : taxon Multicrustacea Regier Shultz Zwick Hussey, Ball, Wetzer, Martin & Cunningham, 2010 ( + class list + orders list)
* Tree of Life Web Project : Multicrustacea
* Animal Diversity Web : Multicrustacea
* Catalog of Life : Multicrustacea
* IUCN : taxon Multicrustacea