Diaptomus is a genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of copepod

Copepod

Copepods are a group of small crustaceans found in the sea and nearly every freshwater habitat. Some species are planktonic , some are benthic , and some continental species may live in limno-terrestrial habitats and other wet terrestrial places, such as swamps, under leaf fall in wet forests,...

s with a single eye spot. It is superficially similar in size and appearance to Cyclops

Cyclops (genus)

Cyclops is one of the most common genera of freshwater copepods, comprising over 400 species . The name Cyclops comes from the Cyclops of Greek mythology which shares the quality of having a single large eye, which may be either red or black in Cyclops.Cyclops individuals may range from...

. However it has characteristically very long first antennae

Antenna (biology)

Antennae in biology have historically been paired appendages used for sensing in arthropods. More recently, the term has also been applied to cilium structures present in most cell types of eukaryotes....

 that exceed the body length. In addition, the females carry the eggs in a single sac rather than the twin sacs seen in Cyclops. It is a copepod of larger freshwater

Fresh Water

Fresh Water is the debut album by Australian rock and blues singer Alison McCallum, released in 1972. Rare for an Australian artist at the time, it came in a gatefold sleeve...

 lakes and still waters.

Species

Diaptomus contains more than 60 species; many species formerly included in Diaptomus are now in separate genera such as Aglaodiaptomus

Aglaodiaptomus

Aglaodiaptomus is a genus of copepods in the family Diaptomidae. They are often bright red or blue due to carotenoid pigments.-Conservation status:...

and Notodiaptomus

Notodiaptomus

Notodiaptomus is a genus of copepods in the family Diaptomidae. It is the most widely distributed, most abundant and most species-rich genus of freshwater calanoid copepods in the Neotropics. The genus was erected in 1936 by Friedrich Kiefer for eleven species formerly placed in a wider Diaptomus...

. One species, the German

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 endemic D. rostripes, is included on the IUCN Red List

IUCN Red List

The IUCN Red List of Threatened Species , founded in 1963, is the world's most comprehensive inventory of the global conservation status of biological species. The International Union for Conservation of Nature is the world's main authority on the conservation status of species...

 as a Data Deficient

Data Deficient

Data Deficient is a category applied by the IUCN, other agencies, and individuals to a species when the available information is not sufficient for a proper assessment of conservation status to be made...

 species.

• Diaptomus affinis Ulyanin, 1875
• Diaptomus africanus Daday, 1910
• Diaptomus alpestris (Vogt, 1845)
• Diaptomus angustaensis Turner, 1910
• Diaptomus armatus Herrick, 1882
• Diaptomus azureus Reid, 1985
• Diaptomus barabinensis Stepanova, 2008
• Diaptomus bidens Brehm, 1924
• Diaptomus biseratus Gjorgjewic, 1907
• Diaptomus borealis (Fischer, 1851)
• Diaptomus caeruleus (Koch, 1844)
• Diaptomus caesius (Koch, 1844)
• Diaptomus carinifera Lowndes, 1934
• Diaptomus carnicus Senna, 1890
• Diaptomus castaneti Burckhardt, 1920
• Diaptomus castor (Jurine, 1820)
• Diaptomus claviger O. F. Müller, 1785
• Diaptomus cookii King, 1855
• Diaptomus cyaneus Gurney, 1909
• Diaptomus falcifer Daday, 1905
• Diaptomus falsomirus Kiefer, 1972
• Diaptomus flagellatus Ulyanin, 1874
• Diaptomus flagellifer Brehm, 1953
• Diaptomus fluminensis Reid, 1985
• Diaptomus fuscatus Brady, 1913
• Diaptomus ganesa (Brehm, 1950)
• Diaptomus gatunensis Marsh, 1913
• Diaptomus giganteus Herrick, 1881
• Diaptomus glacialis Lilljeborg, 1889
• Diaptomus guernei Imhof, 1891
• Diaptomus helveticus Imhof, 1885
• Diaptomus hyalinus (Koch, 1844)
• Diaptomus informis (Kiefer, 1936)
• Diaptomus innominatus Brady, 1907
• Diaptomus kenitraensis Kiefer, 1926
• Diaptomus kentuckyensis Chambers, 1881
• Diaptomus kincaidi Damkaer, 1988
• Diaptomus leoninicollinus Marsh, 1913
• Diaptomus ligericus Labbé, 1927
• Diaptomus lighti M. S. Wilson, 1941
• Diaptomus ligusticus Brian, 1927
• Diaptomus linus Brandorff, 1973
• Diaptomus longicornis Nicolet, 1848
• Diaptomus maria King, 1855
• Diaptomus meridionalis Kiefer, 1933
• Diaptomus mirus Lilljeborg in Guerne & Richard, 1889
• Diaptomus muelleri (Ferussac, 1806)
• Diaptomus negrensis Andrade & Brandorff, 1975
• Diaptomus nigerianus Brady, 1910
• Diaptomus ovatus (Koch, 1844)
• Diaptomus palustris Kiss, 1960
• Diaptomus pattersonii (Templeton, 1838)
• Diaptomus pictus Brady, 1913
• Diaptomus pollux King, 1855
• Diaptomus rehmanni Grochmalicki, 1913
• Diaptomus rostripes Herbst, 1955
• Diaptomus rubens (O. F. Müller, 1785)
• Diaptomus rubens (Koch, 1844)
• Diaptomus santafesinus Ringuelet & Ferrato, 1967
• Diaptomus silvaticus S. Wright, 1927
• Diaptomus staphylinus (Milne Edwards, 1840)
• Diaptomus tenuicornis (Dana, 1849)
• Diaptomus trybomi Lilljeborg in Guerne & Richard, 1889
• Diaptomus uxorius King, 1855
• Diaptomus vexillifer Brehm, 1933
• Diaptomus wolterecki (Brehm, 1933)
• Diaptomus zografi Kritchagin, 1887