The Cyclopoida are an order of small

crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapoda, decapods, ostracoda, seed shrimp, branchiopoda, branchiopods, argulidae, fish lice, krill, remipedes, isopoda, isopods, barnacles, copepods, ...

s from the subclass

Copepod Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat. Some species are planktonic (inhabiting sea waters), some are benthic (living on the ocean floor), a number of species have ...

a. Like many other copepods, members of Cyclopoida are small,

plankton Plankton are the diverse collection of organisms found in water (or air) that are unable to propel themselves against a current (or wind). The individual organisms constituting plankton are called plankters. In the ocean, they provide a cruc ...

animal Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage ...

s living both in the sea and in freshwater

habitats In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...

. They are capable of rapid movement. Their larval development is metamorphic, and the

embryo An embryo is an initial stage of development of a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male spe ...

s are carried in paired or single sacs attached to first abdominal

somite The somites (outdated term: primitive segments) are a set of bilaterally paired blocks of paraxial mesoderm that form in the embryonic stage of somitogenesis, along the head-to-tail axis in segmented animals. In vertebrates, somites subdivide ...

Distinguishing features

Cyclopoids are distinguished from other copepods by having first antennae shorter than the length of the head and thorax, and uniramous second antennae. The main joint lies between the fourth and fifth segments of the body.

Taxonomy

Cyclopoida contains 30 families: * Archinotodelphyidae Lang, 1949 * Ascidicolidae Thorell, 1859 * Botryllophilidae Sars G.O., 1921 * Buproridae Thorell, 1859 * Chitonophilidae Avdeev & Sirenko, 1991 * Chordeumiidae Boxshall, 1988 * Corallovexiidae Stock, 1975 * Cucumaricolidae Bouligand & Delamare-Deboutteville, 1959 * Cyclopettidae Martínez Arbizu, 2000 * Cyclopicinidae Khodami, Vaun MacArthur, Blanco-Bercial & Martinez Arbizu, 2017 *

Cyclopidae The Cyclopidae are a family of copepods containing more than half of the 1,200 species in the order Cyclopoida in over 70 genera. Genera These genera are accepted as valid: *'' Abdiacyclops'' Karanovic, 2005 *'' Acanthocyclops'' Kiefer, 1927 * ...

Rafinesque, 1815 * Cyclopinidae Sars G.O., 1913 * Enterognathidae Illg & Dudley, 1980 * Enteropsidae Thorell, 1859 * Fratiidae Ho, Conradi & López-González, 1998 * Giselinidae Martínez Arbizu, 2000 * Hemicyclopinidae Martínez Arbizu, 2001 *

Lernaeidae Lernaeidae is a family of copepods belonging to the order Cyclopoida. Genera Genera: * '' Afrolernaea'' Fryer, 1956 * '' Amazolernaea'' Thatcher & Williams, 1998 * '' Areotrachelus'' Wilson, 1924 * '' Bedsylernaea'' Thatcher & Williams, 1998 * ...

Cobbold, 1879 * Mantridae Leigh-Sharpe, 1934 * Micrallectidae Huys, 2001 * Notodelphyidae Dana, 1853 * Oithonidae Dana, 1853 * Ozmanidae Ho & Thatcher, 1989 * Paralubbockiidae Boxshall & Huys, 1989 * Psammocyclopinidae Martínez Arbizu, 2001 * Pterinopsyllidae Sars G.O., 1913 * Schminkepinellidae Martínez Arbizu, 2006 * Smirnovipinidae Khodami, Vaun MacArthur, Blanco-Bercial & Martinez Arbizu, 2017 * Speleoithonidae Rocha & Iliffe, 1991 * Thaumatopsyllidae Sars G.O., 1913 * Cyclopoida ''

incertae sedis ' () or ''problematica'' is a term used for a taxonomic group where its broader relationships are unknown or undefined. Alternatively, such groups are frequently referred to as "enigmatic taxa". In the system of open nomenclature, uncertain ...

'' – 8 genera Several more families are included in Suborder

Poecilostomatoida Poecilostomatoida are an suborder of copepods. Although it was previously considered a separate order, recent research showed it to be nested within the Cyclopoida Description The classification of these copepods has been established on the ba ...

, a temporary name for the "poecilostome lineage" The Poecilostomatoida were previously treated as a separate order, but molecular phylogenies show that this lineage is nested within the Cyclopoida.

References

External links

Cyclopoida fact sheet - Guide to the marine zooplankton of south eastern Australia

Cyclopoida pictures

{{Taxonbar, from=Q899782 Crustacean orders